Wednesday, September 17, 2014

The Universe Is Real and Not Real: An Interpretation Of Quantum Mechanics

Our Place In the Universe

Thanks to the work of countless scientists dating back millennia, we know a great deal about how nature works. We have an idea of our place in the unimaginably vast universe, an idea of how everything in the universe began and of how it might all end. But we don't know everything. What IS an electron, a photon, a quark or any other elementary particle? How do we visualize the particles of energy and matter, and how deeply have we pondered the fact that matter and energy are ultimately equivalent? We must consider too that particles are never isolated. They exist in situ in Einstein's well-established space-time, and, although the theories of relativity, which describe space-time, are highly successful, physicists speculate there may be more to it. It could be built of many dimensions or of inter-dimensions, and there is evidence that virtual particles bubble in and out of space-time fabric all the time. Our current understanding of space-time breaks down at the extremes of the universe - at its very beginning and at black holes - where gravity appears to be infinitely concentrated and physical space contracts to a point. What is a black hole really? And what came before this universe, if anything? These are the questions that ensure that the universe remains the beautifully complex puzzle it is and they are some of the best fodder for those amongst us who have philosophical leanings. Of all the areas of active research in physics, perhaps quantum mechanics contains the richest treasure of all. In fact, it is difficult to imagine someone who has grappled with quantum mechanics who hasn't been shocked by the unfathomable secret life of our universe.

We are not outside looking in on the mystery. We are made up of it too. Our bodies and our minds operate by quantum mechanical rules. Our furniture, our houses, the trees, soil and animals are all quantum mechanical in nature. Everything - all particles of matter and all particles of energy - at their heart are quantum mechanical. It is easy to forget this fact because the uncertainties inherent in particles of matter virtually cancel each other out when billions upon billions of atoms combine chemically and physically into an everyday macroscopic object. We can observe and measure different aspects of objects without disturbing them because the energy of the photons used to see the object represent a miniscule fraction of the energy, or momentum, of the object as a whole. We can measure both the velocity and the position of an object simultaneously because there is virtually no quantum uncertainty in such large collections of atoms.

None of these measurements work for us at the quantum mechanical scale of matter. It is not because we haven't found instruments fine enough. It is because, by its very nature, matter at this scale does not lend itself to such probing. This strange line drawn in the sand does not mean that quantum uncertainty disappears altogether in everyday sized objects. It just becomes imperceptible. The underlying physics does not change as we go from quantum scale to macroscopic scale; only our perception does.

So what does quantum mechanics tell us about matter and energy? I believe Richard Feynman was correct - all we need to appreciate the mystery of quantum mechanics is to look at how electrons (fermions or particles of matter) and photons (bosons or particles of energy) behave in various versions of Young's double slit experiment. The problem we have digesting the simple but unfathomable conclusions of this experiment has to do more with our minds than anything else.

Consider that we have evolved to interact with our classical everyday, and predictable, world of solid objects separated by empty spaces and permeated by time's one-way flow. Our perception is extremely limited. Our lives are only a micro-thin slip of time in the eons through which the universe has evolved. We can't even perceive evolution or geologic change. We don't move fast enough to see the effects of special relativity and we do not possess the sensory organs to see space-time stretch around our mass, but we do feel it as gravity's pull. In terms of size, we are unimaginably tiny specks in our own solar system, let alone the Milky Way, which is just one of countless galaxies in the universe. And yet, our perception is on far too large a scale to even begin to appreciate just how small an atom is. Not just our bodies are limited by our evolution. Our minds too have evolved to make logical sense of the everyday world, not quantum mechanics. We have extreme difficulty conceptualizing any reality other than our familiar three dimensions of space. What does a four-dimensional building block look like? Einstein's very useful and very well documented four-dimensional construct of space-time, where time is treated mathematically just like an additional spatial dimension, tells us that we exist in a context that is far more complex than our minds would let us believe. Have we digested the simple fact that time and space are complementary and equivalent components of space-time? According to special relativity, space contacts as time spreads out and vice versa. Neither time nor physical space is absolute. As I said we are limited beings, and while it is disconcerting to do so, isn't it good practice as scientific explorers to keep reminding ourselves of what we don't know, of what we can't know?

This discussion is mental preparation for working toward your own personal interpretation of quantum mechanics. You may have researched quantum mechanics and read about what some physicists have to say on the matter in the two previous articles in this series, or on your own. In this article I lay out my own interpretation for you to consider and critique. I tend to like to stick to the most basic raw data I can find while trying to resist any interpretive embellishment, a tactic I think most scientists use. For quantum mechanics this forces us into a quandary. Something has to give. Either you bend the data to fit into something you can conceive or you loosen your grip on common sense and logic and let your mind bend to the data. As I've explored quantum mechanics, I've experienced a slow migration from the former tactic to the latter one. Therefore, I personally resist ideas of hidden variables and other efforts to retain locality and realism when I ponder the experimental data. Most importantly, while I lay out my perspective, I leave your decision to you. Ponder the evidence and ponder my and other people's positions. Be brutal - find holes in arguments and consider new ways of looking at the data.

There are three basic experiments - Young's double slit experiment, the delayed choice experiment and the EPR thought experiment - that I tend to rely on as the basis for my interpretation of quantum mechanics. I try to allow myself to hear what they say in their most naked form. I explored the double slit experiment and the delayed choice experiment in the article What Is An Electron REALLY? and I covered the EPR thought experiment in Interpretations of Quantum Mechanics, but I think it is worth revisiting the first two experiment's results with an ear to what they say and, more importantly, what they don't say about the quantum behaviour of particles.

What Young's Double Slit Experiment Says

To refresh our memory, this 9-minute video by professor Jim Al-Khalili demonstrates how the double slit experiment works:



The double slit experiment demonstrates that particles such as photons and electrons have both a wave nature and a particle nature. A laser beam or an electron beam (red arrow) strikes a plate pierced by two slits, as shown below right.

Inductiveload;Wikibooks



If light is used, the light shines on a screen behind the plate. If electrons are used, the screen behind the plate is an electron detector, detecting the charge of each electron that strikes it. In both cases, an interference pattern appears (see below left bottom image). Both light and the electrons pass through the two slits as if they were waves. If a single slit is used, then no interference pattern is observed (see below left top image). These are the same results you would expect of classical mechanical waves, if you used water instead of particles. You create waves in a water tank and set up a barrier with either one or two slits and then observe the wave pattern behind that barrier.

Jordgette;Wikipedia




And yet, both light (photons) and electrons are always detected as discrete particles on the detection screens. This is where classical physics and quantum physics part ways. The interference pattern is created by the varying density of discrete bright spots as these particles strike the screen. These results show very clearly that particles have both a wave and a particle nature, called wave-particle duality. This experiment has been done with atoms, molecules and even objects as large as buckyballs, proving that particles and objects of matter have a wave nature. When compared, they even their own specific frequencies. The probability of detection is mathematically the modulus squared of the wave-function. This gives you a real number that describes the probability density of finding a particle in a certain place at a certain time. Where waves cancel each other out, a particle merely shows up in another location at the detector.

This is not all, however. This experiment also shows us that particles are intrinsically probabilistic. If a beam of photons or electrons is slowed down so that just one particle is shot out at a time with a pause in between firings, which can be a millisecond or a year long, the interference pattern still shows up. Particles shot individually interfere with themselves. The images below left show how electrons shot individually gradually build up an interference pattern over time. This pattern build-up is completely random, so that if this experiment is repeated, the first few dots will appear in different random locations on the screen and so on, but the same interference pattern always builds up.

Belsazar;Wikipedia

This tells us that somehow the particles "know" where to go in order to build up a pattern and that this seeming pre-arrangement process is statistically purely random.

Even more interesting is the fact that if we keep two slits open and place particle detectors at the slits, telling us which slit a particle goes through, the interference pattern disappears. Upon being measured, the particle's wave nature collapses into particle nature in other words. Recent experiments show that some information about a particle's position at the slits can be obtained and still retain some of the interference pattern. It is not an all or nothing situation. Disturbing the particle just a little bit (and obtaining a slightly unreliable answer as to which slit it passed through) will retain some (reduced) wave interference. An undisturbed particle acts like a wave. A disturbed particle collapses into its particle nature. A measurement is like a collision to a particle. In order to "see" the particle something must bounce off it such as a photon or electron. This means that a photon can never be seen in flight because it cannot be detected with 100% certainty until it reaches the end of its current life, until it is absorbed, for example, by an electron in a photomultiplier detection screen.

What Delayed Choice Experiments Tell Us

According to the double slit experiments, a particle seems to travel in one of two guises - wave and particle. When two slits are open, the particle seems to decide to travel as a wave as soon as it is emitted. When one slit is open, the particle seems to decide to travel as a particle as soon as it is emitted. When photons are used it seems clear that the photon acts like a wave as it goes through two slits simultaneously, interferes with itself, and then manifests as a particle when it is detected as a localized point of brightness on the detector screen. When a photon is shot through only one slit it seems to act like a particle the whole time, since no interference pattern is seen.

The question then is when does the particle decide which guise it's going to use? Another way of putting this is to ask if a particle senses the experimental apparatus it will travel through and decide right off the bat whether to act like a particle or wave accordingly? Or, does a particle remain in an indeterminate superimposed state throughout the experiment, and depending on what questions are asked of it, respond by "looking" like a wave or "looking like a particle? John Wheeler asked these questions in 1978 and set about answering them by designing a series of delayed choice thought experiments which were later carried out.

Delayed choice experiments showcase an especially interesting aspect of quantum behaviour. A common example of such a design is the simple interferometer. To explore particle behaviour, this experiment is done using two slightly different setups - one without a second particle beam splitter (setup #1) and one with a second beam splitter (setup #2). A diagram of setup #1 is shown below.

adapted from Patrick Edwin Moran;Wikipedia
A single photon is emitted at the entry port in the bottom left corner (red arrow). It immediately hits a beam splitter (pink rectangle) just to its right. The photon has two path choices. It has an equal chance at this point of being reflected or transmitted through. It can go straight through (blue arrow) and be reflected by the mirror, lower right (grey rectangle) and then be detected at the upper right corner by the detector (diagonal line). Or, it can be reflected by the beam splitter (green arrow), hit the mirror at the upper left corner and then be detected at the upper right corner by the detector. Observations invariably show that equal numbers of photons show up at each detector, which indicates that the photons act like particles the whole time, just like pinballs act in a pinball game. No wave behaviour is observed.

Now we change the setup as shown in the image below.

adapted from Patrick Edwin Moran;Wikipedia
The only change here is a second beam splitter (pink rectangle) is placed in the upper right corner of the apparatus. Now, the detector shows interference of the photon (with itself). This means that each photon emitted must have traveled by both paths: to the right (blue arrow) and upward (green arrow) and, just like we saw with the double slit experiment, this indicates each photon must have traveled as a wave. Note once again that the configuration of the experiment has not been changed except for the second beam splitter being added near the end of the photon's journey. Placement of the second beam splitter seems to tell the photon to act like a wave by going through both paths instead of just one, but how does the photon "know" it is there before it gets to it?

We can refine this setup further by removing or placing the second beam splitter after the photon has gone through the first beam splitter but before it has reached the second beam splitter. Photons obviously travel fast so in this case the distances between the mirrors and splitters can be lengthened, up to several kilometres as desired. When we do this, we should see whether a photon, which is set up to show particle effects, for example (starts with no second beam splitter), can reverse its decision en route and show interference (after fast insertion of the second beam splitter). As it turns out, the photon always shows particle effects when the second beam splitter is absent at the end and it always shows wave effects when the beam splitter is present at the end, even when the beam splitter is removed or put in just before the photon gets there.  Does this mean that the photon somehow went backward in time to change its mind? Or is there another possible explanation for these results?

A Brief Look At the Effects of Relativity

Three particle behaviours made apparent by the delayed choice experiment - instantaneous information sharing, what seems to be retrocausality, and the particle's ability to be in two places at once - absolutely run counter to common sense. However these are not the only phenomena that don't follow our common sense rules.

Consider relativity. It is well documented experimentally that when objects approach light speed, time for them slows down relative to us, the observer. For example, unstable particles created in accelerators that are travelling very near light speed have been shown to exist for much longer than their non-relativistic lifespans. What if one of these particles could observe us, the observers? Our timeframe, or our "clock," would seem to be set on fast-forward, while its "clock" would run normally, at least from its perspective. And from our perspective, its "clock" would appear to run slow. This is time dilation in special relativity. Because of time dilation, within the limit of light speed, a past event for one observer can be a future event for another, and events separated by time in one frame of reference can appear simultaneous in another one. Now consider a particle such as a photon traveling exactly at light speed. To it, our clock would be running so fast our lives would pass in an instant before it. In fact the entire lifespan of the universe would pass in an instant. To us, the photon's "clock" would appear be stopped forever.

Meanwhile, another effect called Lorentz contraction in special relativity means that for a particle travelling near light speed, space contracts relative to an observer. Since it is impossible to imagine what a photon "looks" like in flight, let's imagine watching a space ship fly by us at close to light speed. That space ship would appear shortened in the direction it was going, although people in it would notice no such effect. For a photon flying past us at light speed, this would mean that physical space contracts to a flat sheet that has no width from our perspective. It would appear that the photon, with its "clock" stopped, would have no distance to travel, relative to us. From the photon's perspective, however, its "clock" and distance would appear unaffected. This doesn't mean that special relativity explains the photon's quantum behaviours, and it clearly doesn't significantly impact the same behaviour observed for electrons traveling through the experiments at speeds well below light speed, but it does remind us to exercise caution when we place our everyday-world assumptions on the quantum behaviours of particles.

I personally don't believe that backward time travel (retrocausality) is involved in the delayed choice experiment. Wheeler himself considered the photon to be neither particle nor wave at any given point in time. Instead it was intrinsically undefined, until the moment it was measured. As an undefined particle, it is not necessary to invoke retrocausality because the decision to define itself is made right at the detector (where the particle's wave function collapses) and not before. This would mean that in both setups, the photon travels in an undefined state even though it appears to us to travel as a particle in setup #1 and as a wave in setup #2. And when a second beam splitter is placed and removed, the photon simply makes its decision right there to act one way or the other. I find that Wheeler's assumption of an undefined state fits most simply with the results.

Conclusions of These Two Experiments

Both the double slit experiment and the delayed choice experiment tell us that photons (and electrons) travel in an undefined state as neither particle nor wave, or they travel as a superposition of both particle and wave, but they are never just particle or just wave alone as they travel. Once a particle hits a detector or is measured by some other mechanism, it must out of necessity experience a collision (either with an electron in matter or another photon) and a collision ends that particle's undefined or superimposed state. The particle's wave function collapses into a particle state. We can make a choice between neither and both at this point. It seems to me that both or "superimposed" is the better choice of the two possible undefined states. The beauty of the double slit experiment is that it clearly shows evidence of the particle's wave nature even though each particle hitting the detector hits it as a point-like particle. We cannot directly witness any particle travelling along as a wave but in this experiment we see clear evidence that it does act as a wave somehow as it travels.

Maybe the most spellbinding conclusion of these experiments is that, while traveling in a superimposed state where wave nature is always there, particles have no problem whatsoever traveling two different routes at the same time. Recall that one photon somehow must travel through both slits in order to interfere with itself as a wave. Where it ends up individually is random even though a wave pattern builds up as particles strike the detector. In fact, the double slit experiment suggests that an infinite number of simultaneous routes are possible as the interference pattern randomly builds up. This tells us that undetected particles are spread out in physical space as waves (and this space can be astronomically large). This spread out state acts according to the rules of probability only, and it is this aspect of their nature that lends to Einstein's spooky action at a distance (quantum entanglement) as well as the intrinsic unpredictability of all particle behaviour.

This means that, to the particle, there is no "here" or "there." Consider the second delayed choice scenario with the additional beam splitter. A particle split by a beam splitter travels two vastly separate routes simultaneously (as a wave). As it does so, it always retains the reality of its "twin" so that it always ends up at the detector interfering with itself as two waves. When no second beam splitter is present, I argue that the photon still travels in the same superimposed state but its wave nature is not apparent. Now consider the EPR experiment discussed in a previous article. Two quantum-entangled particles, separated by even astronomical distances, retain the reality of their twin so that when one particle's wave-function collapses, its twin particle's wave-function collapses immediately as well. Each particle retains the other particle's reality. Spin or location can also demonstrate this. They are always found to be complimentary to the entangled partner. For example, when one particle collapses as spin-up, its partner immediately collapses as spin-down and vice versa. Before the collapse neither particle has a defined quantum spin orientation. Do these experiments tell us that faster than light communication or backwards through time communication is going on between particles? Or do they tell us that distance (physical space) itself is an illusion? I personally think, once again, that it is simplest to accept the second choice. The EPR experiment illuminates the inescapable nature of non-locality in quantum mechanics. You can tweak the definition a bit and call it "non-separability" just as accurately. In fact, I believe that this also defines particles as interdependent because the reality of two entangled particles is spread out as a single wave-function, which describes them both as a single more complex entity. And when we consider the probabilities of all the wave-functions of all particles in the universe spreading out to infinity, it seems that, out of necessity, every particle must overlap with every other particle's wave-function, even though the chance of a particle across the universe interacting with a particle right here would be infinitesimally small.

Is the superimposed state of a particle (which we cannot directly observe, measure or experience) the reality? Or, is the collapsed state where the particle is defined by its particle nature the reality? It is interesting to speculate on these choices when we consider that the particle in flight (the photon of light flying through space or the electron flying around the nucleus, for example) is dynamic BUT undefined and the collided or absorbed particle is static, like an afterimage, but defined. When we observe and measure, what are we observing or measuring? When we think of the endless flow of transformation and evolution in the universe, is that activity encapsulated in the still snapshots we take with our instruments or is better encapsulated in the superimposed flowing reality that escapes our notice?

What is an electron then? Mathematically it is a wave-function, but does that wave-function have any physical reality? It seems, based on the results above, that it transforms into what we would normally call a physically real locatable object only when its wave-function collapses. Does it appear then ex nihilo? The wave function is mathematically predicted to extend in all directions without end, although the probability density of a particle's location is centered on one location and very rapidly diminishes from that point. Is this wave function also the "real" particle, and if so where does each particle end? Each wave-function seems to be filled with the smallest probability of the entire universe's matter. The experimental results of the double slit experiment suggest to us that there is no such thing as absolutely empty space. Space seems to be a pregnant "empty" filled with wave-particle-position-spin-velocity potential. Otherwise, we must consider space to be a true vacuum with particles appearing out of nothing. To me, at least, the former possibility - a potential-filled space - seems to fit the quantum experimental results best.

I think many of us expect that, with effort and time, we can reach an understanding of the workings of the universe, and that somehow it all has to fit together like a puzzle does. In that puzzle, each piece should have its own definable separate physical reality. Quantum mechanics tells us, very clearly, that none of this is true. It's a slap in anyone's logical face, and it can feel very defeating.

There are clear merits of, and subscribers to, all the interpretations of quantum mechanics investigated in the last article. However, I personally think it is simplest to accept reality at its deepest level as a potential-filled emptiness. What we perceive of this reality seems to me to resemble a series of moving flashcards creating a moment-to-moment forward flow of time. Each "flashcard" is a slightly changed collapsed state of particles. Our perception is like the act of flipping through the cards, and this progression of subtle change after subtle change is what we perceive as the flow of time. I imagine our perception as being a bit like the changing views of this cute kitten stalking the camera:

(yfrimer;utube)

We perceive the cards to be real but they are a facsimile of a deeply complex and truly dynamic potential-filled "space." Each card shows us our subjective reality at a particular moment in time. What is shown on it depends entirely on how we make our observation.

My interpretation disagrees with the Copenhagen interpretation not because I assume that the wave-function is real, but because I consider neither it nor the collapsed particle state to be real. An atom therefore has no intrinsic reality. An atom of matter, as a complex wave function, has no permanent properties. Its mass can be converted entirely to energy and vice versa. The locations, velocities, spin and all other quantum properties of its constituent particles - electrons and quarks - depend on how they are observed and have no immutable intrinsic reality. So, then, is the atom just a product of relationships, all of which have no fundamental reality? I would answer yes. If there is any fundamental reality, I think it is the potential-filled "space" of the universe. I use the word "space" with some skepticism because space too can transmute into time and vice versa (as shown by special relativity), suggesting that it too has no ultimate reality. To the particle in the experiments, it too seems that physical space and distance have no meaning.

The photon and electron and all particles of matter and energy are alive as superimposed states in space-time, which seems to be inexorably connected to them. I think we are just not built to perceive it.

By extension, if particles of matter have potential but no tangible reality, then macroscopic objects also have no tangible reality, even though we experience them as reliable, stable and solid separate entities. The desk, the moon, our bodies and the galaxies, are illusions or mirages. Some of these mirages last for billions of years, but they are no more physically real than the particles/wave-functions that make them up.

Check out the next article: Sometimes Passions Run High, a response to the overwhelming response to this article.

21 comments:

  1. Hi Gale,

    In the previous thread you posted, "A possible difference in views might be in how matter and energy are treated in this aether of space-time. My argument (and fractal theory is similar) is that ultimately space, time, and particles of matter and energy are different facets of one underlying ultimate reality. So, I am lumping in matter with space-time. What is your take on that notion? Again, I invite you to try my next article and see what you think."

    'Ether and the Theory of Relativity - Albert Einstein'
    http://www.tu-harburg.de/rzt/rzt/it/Ether.html

    "Since according to our present conceptions the elementary particles of matter are also, in their essence, nothing else than condensations of the electromagnetic field"

    The electromagnetic field is a state of the aether. Particles of matter are condensations of aether. Aether has mass.

    'DOES THE INERTIA OF A BODY DEPEND UPON ITS ENERGY-CONTENT?' A. EINSTEIN
    http://www.fourmilab.ch/etexts/einstein/E_mc2/e_mc2.pdf

    "If a body gives off the energy L in the form of radiation, its mass diminishes by L/c2."

    The mass of the body does diminish. However, the matter which no longer exists as part of the body has not vanished; it still exists, as aether. Matter evaporates into aether. As matter evaporates into aether it expands into neighboring places; which is energy. Mass is conserved.

    When a nuclear bomb explodes matter evaporates into aether. The evaporation is energy. Mass is conserved.

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  2. Fascinating! I can see now how your argument for ether as actually a reminder of a past argument Einstein himself made many decades ago, and that I have been tackling QM according to the current scientific vogue of dismissing ether (and claiming Einstein was wrong). Investigating the double slit experiment brings us once again face-to-face with evidence that something is going on with matter, space and time. It is not directly observable but its evidence is in the many-places-at-once quantum nature of matter. I urge readers to read through the two articles you link to and to decide for themselves on this sticky matter of ether versus not ether. I especially found Einstein's 1920 U of Leyden address (http://www.tuhh.de/rzt/rzt/it/Ether.html) eye-opening. To me at least, it encapsulates what this new "modern" ether might be (and it seems to me that Feynman's summed particle trajectories describing some kind of underlying geometric structure is not that far off from what Einstein himself may have been moving toward). In my response, I've captured parts of Einstein's speech that seem for me to really bring home this point:

    "Not every extended conformation in the four-dimensional world can be regarded as composed of worldthreads. The special theory of relativity forbids us to assume the ether to consist of particles observable through time, but the hypothesis of ether in itself is not in conflict with the special theory of relativity. Only we must be on our guard against ascribing a state of motion to the ether."

    "Certainly, from the standpoint of the special theory of relativity, the ether hypothesis appears at first to be an empty hypothesis. In the equations of the electromagnetic field there occur, in addition to the densities of the electric charge, only the intensities of the field. The career of electromagnetic processes in vacuo appears to be completely determined by these equations, uninfluenced by other physical quantities. The electromagnetic fields appear as ultimate, irreducible realities, and at first it seems superfluous to postulate a homogeneous, isotropic ether-medium, and to envisage electromagnetic fields as states of this medium."

    But on the other hand there is a weighty argument to be adduced in favour of the ether hypothesis. To deny the ether is ultimately to assume that empty space has no physical qualities whatever. The fundamental facts of mechanics do not harmonize with this view. For the mechanical behaviour of a corporeal system hovering freely in empty space depends not only on relative positions (distances) and relative velocities, but also on its state of rotation, which physically may be taken as a characteristic not appertaining to the system in itself."

    "It is true that Mach tried to avoid having to accept as real something which is not observable by endeavouring to substitute in inechanics a mean acceleration with reference to the totality of the masses in the universe in place of an acceleration with reference to absolute space. But inertial resistance opposed to relative acceleration of distant masses presupposes action at a distance; and as the modern physicist does not believe that he may accept this action at a distance, he comes back once inore, if he follows Mach, to the ether, which has to serve as medium for the effects of inertia. But this conception of the ether to which we are led by Mach's way of thinking differs essentially from the ether as conceived by Newton, by Fresnel, and by Lorentz. Mach's ether not only conditions the behaviour of inert masses, but is also conditioned in its state by them."

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  3. Part 2)

    Historically, we read that Einstein was defeated by his stubborn attachment to ether, and quantum mechanics did most of the damage. Now, decades later, it seems really ironic that a notion of ether may ultimately be what brings cosmology and particle physics together.

    Conclusion: To me at least, all of this is saying, look, if we really examine what's going on with the QM experiments AND we consider what Mach's principle is telling us, then we have to consider that the universe is interconnected, both at its most minute level and its grandest level. We can call that interconnectiveness a special kind of ether, if we agree with what Einstein was telling us.

    I recommend that readers look up the Lense-Thirring effect or frame-dragging (http://en.wikipedia.org/wiki/Frame-dragging):
    "Light traveling in the direction of rotation of the object will move past the massive object faster than light moving against the rotation, as seen by a distant observer. It is now the best known frame-dragging effect, partly thanks to the Gravity Probe B experiment. Qualitatively, frame-dragging can be viewed as the gravitational analog of electromagnetic induction."

    This effect is predicted by Einstein's relativity theories. If there ever is an argument for a physically palpable reality to space-time this seems to be it. This effect shows that space-time itself has inertia (but not any kind of viscosity). It seems to hint to me, when I take in the QM experiments, that this new ether would "consist" of energy distribution and that this distribution takes into account all matter, all energy fields, time and space as if they are different facets of one unified interconnected underlying reality.

    Is this kind of on the same track as your thinking?

    ReplyDelete
  4. 'Interpretation of quantum mechanics by the double solution theory - Louis de BROGLIE'
    http://aflb.ensmp.fr/AFLB-classiques/aflb124p001.pdf

    “When in 1923-1924 I had my first ideas about Wave Mechanics I was looking for a truly concrete physical image, valid for all particles, of the wave and particle coexistence discovered by Albert Einstein in his "Theory of light quanta". I had no doubt whatsoever about the physical reality of waves and particles.”

    “any particle, even isolated, has to be imagined as in continuous “energetic contact” with a hidden medium”

    The hidden medium of de Broglie wave mechanics is the aether. The “energetic contact” is the state of displacement of the aether.

    "For me, the particle, precisely located in space at every instant, forms on the v wave a small region of high energy concentration, which may be likened in a first approximation, to a moving singularity."

    A particle may be likened in a first approximation to a moving singularity which has an associated aether displacement wave.

    "the particle is defined as a very small region of the wave"

    "If a hidden sub-quantum medium is assumed, knowledge of its nature would seem desirable. It certainly is of quite complex character. It could not serve as a universal reference medium, as this would be contrary to relativity theory."

    de Broglie is referring to a relativistic aether.

    Aether has mass. Aether physically occupies three dimensional space. Aether is physically displaced by the particles of matter which exist in it and move through it.

    The Milky Way's halo is not a clump of dark matter traveling along with the Milky Way. The Milky Way is moving through and displacing the aether. The Milky Way's halo is the state of displacement of the aether.

    The Milky Way's halo is the deformation of spacetime.

    What is referred to as the deformation of spacetime is the state of displacement of the aether.

    The state of displacement of the aether is gravity.

    A moving particle has an associated aether displacement wave. In a double slit experiment the particle travels through a single slit and the associated wave in the aether passes through both.

    In a double slit experiment it is the aether that waves.

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    Replies
    1. This is surprisingly close to a fractal theory that an associate of mine is working on. I think she would call it a fractal medium rather than either but the general idea is very similar: particles of matter are singularities in the medium and waves in the medium itself are what lend the results of interference in the double list experiment. Thanks once again for your thoughts Mike, I have some thinking to do!

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    2. Whatever you want to call 'it', 'it' has mass, is physically displaced by the particles of matter which exist in 'it' and move through 'it' and is what waves in a double slit experiment.

      What ripples when galaxy clusters collide is what waves in a double slit experiment; the medium with mass which fills 'empty' space.

      Einstein's gravitational wave is de Broglie's wave of wave-particle duality; both are waves in 'it'.

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    3. It seems that the error in interpreting the double slit experiment is to approach it assuming that particles of matter and force are distinct somehow from space-time. When we look at these particle behaviours are we really looking at different faces of a single unified underlying reality? My instinct is to treat the particle in the double slit experiment as inseparable from the wave behaviour, and I would venture further that gravitational waves, frame dragging and particle waves are tied up in an underlying single phenomenon that must somehow breach the gap between quantum mechanics and general relativity – a guess. Is this your position as well?

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  5. Aether displaced by matter relates general relativity and quantum mechanics. Aether displaced by matter is the underlying single phenomenon. Aether displaced by matter is the underlying physical reality.

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  6. Yes. I agree with Mike. Another way to say it is this: Matter rarefies aether and aether rarefies matter. I also argue that aether filled with (real, not virtual) electron-positron dipoles. When electrons and positron come close to each other, they do not annihilate. Instead, they bind together very tightly. The energy they release is in fact their binding energy. When you apply the equation for calculating the "speed of sound" of a material to a material made of electron-positron dipoles, you get exactly the speed of light.
    v = sqrt(stiffness/density)
    The speed of sound of a material increases in materials that are bound very tightly (ie. are very stiff). The speed of sound in water is around 1500 meters per second but the speed of sound in a diamond is close to 12000 meters per second. The "speed of sound" of an electron-positron medium is freakishy fast because the binding energy of the pairs is extremely high and the density extremely low. There are many theories out there that argue that matter itself is also made of electron-positron pairs (Sternglass, Before the Big Bang). In other words, matter emerges from aether. If the vacuum was empty, then from where did matter emerge?

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  7. The following article appears to be saying the same thing you are. In the article the aether has mass and is what waves in a double slit experiment. The aether consists of electron-positron pairs.

    'From the Newton's laws to motions of the fluid and superfluid vacuum: vortex tubes, rings, and others'
    http://arxiv.org/abs/1403.3900

    I agree with Einstein. At this time, we are unable to know if the aether consists of movable particles or not.

    'Ether and the Theory of Relativity by Albert Einstein'
    http://www-groups.dcs.st-and.ac.uk/~history/Extras/Einstein_ether.html

    "Think of waves on the surface of water. Here we can describe two entirely different things. Either we may observe how the undulatory surface forming the boundary between water and air alters in the course of time; or else-with the help of small floats, for instance - we can observe how the position of the separate particles of water alters in the course of time. If the existence of such floats for tracking the motion of the particles of a fluid were a fundamental impossibility in physics - if, in fact nothing else whatever were observable than the shape of the space occupied by the water as it varies in time, we should have no ground for the assumption that water consists of movable particles. But all the same we could characterise it as a medium."

    if, in fact nothing else whatever were observable than the shape of the space occupied by the aether as it varies in time, we should have no ground for the assumption that aether consists of movable particles. But all the same we could characterise it as a medium having mass which is displaced by the particles of matter which exist in it and move through it.

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  8. Thank you, Fractal Woman and Mike! Just thinking about the double slit experiment tells us that something must be going on with particles/space-time that we don't currently understand. Both of these possibilities force us to think outside the box and reconsider the "vacuum" of space. Einstein was brilliant in how he helped us reimagine space-time and gravity, but was he done? As I see it our best options to understand the experiment are a) use my approach that neither space-time nor particles are real in the physical sense or b) reimagine the medium of space-time itself (and particles as a built-in part of it).

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    1. We do understand what occurs physically in nature in a double slit experiment.

      Aether has mass. Aether physically occupies three dimensional space. Aether is physically displaced by the particles of matter which exist in it and move through it.

      What is referred to as the deformation of spacetime physically exists in nature as the state of displacement of the aether.

      Particles of matter move through and displace the aether. A moving particle has an associated aether displacement wave.

      In a double slit experiment the particle travels a well defined path which takes it through one slit. The associated wave in the aether passes through both. As the wave exits the slits it creates wave interference. As the particle exits a single slit the direction it travels is altered by the wave interference. This is the wave guiding the particle. Detecting the particle strongly exiting a single slit destroys the cohesion between the particle and its associated wave in the aether, the particle continues on the trajectory it was traveling and does not form an interference pattern.

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  9. Hi Mike,

    I really liked Einstein's water analogy for particles within an aether-like space-time and I am glad you emphasized that. I think it's a great exercise to help us think rethink space-time based on what we know experimentally. I also have no problem with thinking of aether as a guiding wave for a particle except for one thing: when you shoot one particle at a time through two slits you gradually build up an interference pattern identical to when particles are shown to do when they were all shot at once. There is some way that particles seem to "know" each other's behaviour, even that of a particle that has long since been stopped and absorbed (detected) before the new one is even shot out. It seems to tell us that there is more going on than the presence of an aether-like medium, something time-wise. What's your take on this?

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  10. The don't "know" anything. They are being guided by their associated waves. As the aether wave exits both slits it creates wave interference which alters the direction the particle travels. The particle doesn't wind up where the waves cancel each other.

    "While the founding fathers agonized over the question 'particle' or 'wave', de Broglie in 1925 proposed the obvious answer 'particle' and 'wave'. Is it not clear from the smallness of the scintillation on the screen that we have to do with a particle? And is it not clear, from the diffraction and interference patterns, that the motion of the particle is directed by a wave? De Broglie showed in detail how the motion of a particle, passing through just one of two holes in screen, could be influenced by waves propagating through both holes. And so influenced that the particle does not go where the waves cancel out, but is attracted to where they cooperate. This idea seems to me so natural and simple, to resolve the wave-particle dilemma in such a clear and ordinary way, that it is a great mystery to me that it was so generally ignored." - John Bell

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    1. And so influenced that the particle does not go where the waves cancel out, but is [guided] to where they cooperate.

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  11. John Bell's quote argues for wave-particle duality, which is well established experimentally and I am not arguing against it. I am saying that there must be more to it because particles separated by time still exhibit wavelike interference. With water as an analogy, consider two particle waves indicating interference when they hit a barrier and are recorded. If aether works the same way as water, two waves should interfere and then be reflected back toward the slits and then be reflected back again, creating a complex and degrading wave structure. If a new particle is then fired, its two waves would propagate through this complex degrading wave field. The influence of that field should depend on the rate of firing. What if the previous particle was shot, say, a week ago, then the waves should have subsided at some rate based on, I think if I remember, viscosity and density of the medium. The new particle should act just like the previous one (same initial conditions) but it doesn't in quantum mechanics. It "cooperates" with the previous scintillations at the detector to build up a distinct wave interference pattern, no matter what the time interval between particles is. If for argument the aether has no viscosity and no density, then it seems each wavefront will interact in a complex way with every previous wavefront so that the interference pattern starts precise and then degrades over time as each additional particle is fired. None of this is evident in the results. This seems to me to be a strong argument against aether, at least one that acts mechanically like waves.

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    1. This comment has been removed by the author.

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    2. Please see my latest post . . .

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  12. Watch the following video starting at the 2:40 mark to see a double slit experiment with walking droplets.

    https://www.youtube.com/watch?v=W9yWv5dqSKk

    Each particle is guided by its own wave. This is not a great example of a double slit experiment as the particle is not traveling fast enough to see the interference created by the wave exiting both slits. However, you can see that the particle alters the trajectory it travels after exiting the slits. The particle does not travel the same path each time through the slits. The direction the particle travels has nothing to do with the particles which came before it. Each particle guided by its associated wave will not travel where the waves cancel each other as there is no wave to guide the particle where the waves have canceled each other out. If this experiment were performed with particles traveling faster through the slits in order for the associated wave exiting both slits to create more pronounced wave interference then the particle would form an interference pattern over time.

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  13. "particles of matter have potential but no tangible reality, then macroscopic objects also have no tangible reality" I think physicists would have something to say about that, macroscopic objects exist, to say they don't is the sort of thing Deepak Chopra would say.

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    1. I can restate the puzzle of the double slit experiment results to say that physicists cannot come up with an interpretation that makes logical sense according to our three-dimensional sensibility and perception of time. I went on from this article to write about the reality of the electron itself (you might be interested in reading it) and in that, I further explore how the mathematics that so successfully describe the electron cannot be translated into our perception framework. Whether the electron is physically real or not is not proven by the mathematics used to describe its behaviour, but it is not real in the sense that we understand as real in the world we perceive. I tend toward Einstein's reasoning that there is something about quantum theory that is not yet complete, and perhaps the reliance on probability suggests that most strongly. But I am open to the possibility that that may not be true. There may not be a sub-layer of reality beneath quantum reality. And if there isn't, and quantum physics is more or less complete, than we have to entertain questions about how necessary physical reality is. I think if we are to eventually tie the quantum world together with gravity, either one or both theories are going to have to adjust somehow. It will, I think, demand a fresh look at the problem from a fresh perspective. By loosening our grip on our limited perceptive abilities and putting some more trust in the mathematics (which goes much further than what we can physically model), I believe there is a good chance a truly unified theory of everything is possible.

      This is not giving up on science but rather broadening our choices. The is nothing "Deepak" about moving closer to the mathematical abstract to see what it really tells us about the nature of particles and reality itself. This is also not a move toward calling the math itself reality, at least not for myself. It is simply a move to wrap one's head around what is there and only what is there in the mathematical descriptions that appear to meld best with the observable behaviours. That, I think you must agree, is indeed honest science.

      If someone can prove someday that quantum theory and general relativity cannot meld together in any logical way, then it means that the most basic premise of science itself – that there exists somehow a logical thread that ties all phenomena together – is not true and only then will the veracity of science itself come into question . . .

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