Thursday, February 19, 2009

I Am a Hologram, and So Can You!

Paradigm shifts are rare in science, as anyone who has read Thomas Kuhn's The Structure of Scientific Revolutions knows. The authorities of the scientific establishment, working within a particular frame of reference, are often reluctant to eschew the accepted scientific dogma and adopt new modes of thinking. This is not entirely a bad thing, of course, since skepticism is the basis of science; and when theories explain the majority of the evidence, they deserve to be accepted. However, when the dogma becomes so entrenched that new information not conforming to the prevailing theories is tossed out, the present schema is too rigid to account for dissenting ideas. A current trend in physical science (not all of it fringe) is the emerging concept of the universe as a hologram. Since Newton, scientific materialism has been the conceptual framework of physical science, envisioning the universe as a sort of enormous machine with interrelated parts, through which all explanations of natural phenomena can be reduced to physical laws of nature. In the observable universe, this paradigm has proved remarkably resilient in its explanatory power. But, as it turns out, at the very smallest level, this view of the universe explains essentially nothing, and quantum mechanics must be employed, to the great confusion of most scientists, since the reconciliation of these two theories is among the holy grails of particle physics. According to some scientists, it seems that the model of the universe as a hologram does in fact reconcile some of the discrepancies, not only between Newtonian physics and quantum mechanics, but also string theory, the black hole information paradox, and if the bolder assertions are true, even more extra-natural phenomena.

The universe as a hologram has recently found itself in the news because of the GEO600 gravitational wave detection experiment going on in the German countryside. The experiment was originally designed to detect the enormous gravitational waves sent out by very massive, dense bodies such as neutron stars and black holes. What they didn't expect to find were traces of background noise that may inform physicists of the fundamental limits of space-time itself - where it ceases to behave like the smooth continuum that Einstein described in his theory of relativity and dissolves into a sort of grainy picture filled with little bits of information about our universe. From the article from New Scientist:

According to Hogan, the holographic principle radically changes our picture of space-time. Theoretical physicists have long believed that quantum effects will cause space-time to convulse wildly on the tiniest scales. At this magnification, the fabric of space-time becomes grainy and is ultimately made of tiny units rather like pixels, but a hundred billion billion times smaller than a proton. This distance is known as the Planck length, a mere 10-35 metres. The Planck length is far beyond the reach of any conceivable experiment, so nobody dared dream that the graininess of space-time might be discernable.

That is, not until Hogan realised that the holographic principle changes everything. If space-time is a grainy hologram, then you can think of the universe as a sphere whose outer surface is papered in Planck length-sized squares, each containing one bit of information. The holographic principle says that the amount of information papering the outside must match the number of bits contained inside the volume of the universe.
The researchers at GEO600 had no idea what they were detecting had any real significance until Craig Hogan, a Fermilab physicist at Batavia, Illinois, who had previously predicted that such noise exists, informed the research team that the noise implies we are all living in a giant hologram: that our entire universe and everything in it is a 3D reflection of what is a 2D reality - just as a hologram is a 2D surface appearing to be a 3D image. I am no physicist so I won't attempt a more in depth explanation, (the article linked above provides a pretty good one) but suffice to say that if Hogan is right, all of the "information" of the universe is stored in bits bigger than the Planck length, but which represent information the size of the Planck length in our visible universe, and that the universe we inhabit every day - from atoms and molecules to stars and galaxies - is a sort of "reflection" of the 2D bits. This is useful for understanding the "wholeness" of the universe rather than simply the reductionist version of "leaves for the tree." The source of the theory actually dates further back than this experiment at GEO600 to at least the late 70s, when Stephen Hawking and Jacob Bekenstein discovered that black holes emit radiation, but convey no information about their interior. Once the black hole is gone, all of the physical information about its existence is gone with it. This breaks the physical law that physical information cannot be destroyed and is known as the black hole information paradox. According to the holographic universe theory, the information is actually contained in these bits of information on the sphere - the very noise that the GEO600 may be detecting.

The researchers are quick to point out that this is not "proof" that such a model of the universe is accurate, but that the evidence that it should be taken seriously is mounting. The implications for the scientific community are, of course, staggering, but what of the metaphysical ones? Major discoveries in science are often accompanied with major philosophical reinterpretations of the universe - heliocentricism, evolutionary theory, the modern genetic synthesis, relativity have all affected humanity's outlook on its place in the universe. What of this theory? After some research, I found it extraordinarily interesting that, even though it is only recently that evidence has begun to accumulate to support the holographic theory, the notion has been around among both scientific and philosophical minds alike for several decades now.

The holographic model of the universe gained traction in the 1970s as the University of London's David Bohm, a protege of Einstein's who also worked with J. Robert Oppenheimer in the 1940s and 50s, became frustrated by modern theoretical physics' inability to explain natural phenomena encountered in quantum physics. It was also explored around the same time by Stanford neuropsychologist Karl Pribram, who believed that the prevailing views on human consciousness could not account for certain functionalities in human perception. If the holographic paradigm of the universe ever supplants the materialist one, it will be a prime example of multiple discovery within the memetic zeitgeist of the human scientific experience if ever there was one, and perhaps even more so, since the discovery was made by two researchers working in different fields. Unless, of course, you believe some of the more outrageous claims about the theory that the mind sciences and physics are merging into one field.

Prior to the GEO600 experiment, the most recent synthesis of the holographic universe has been put on display in Michael Talbot's book The Holographic Universe, written in 1991. Talbot writes in the intellectual tradition of Fritjof Capra and Frank Tipler, in the sense that much of his work is characterized by an attempt to reconcile various physical phenomena with supernatural mysteries and mystical religious experiences. Capra, in his Tao of Physics, wrote of the striking similarities between what modern particle physics revealed about the nature of the cosmos and the mystical veins in Eastern religions, especially Buddhism, Hinduism, and Taoism. Tipler believes that the the Omega Point theory implying a quantum singularity at the end of the universe implies that life after death and the immortality of the conscious mind is a reality. In fact, Tipler says in the introduction to his book Physics and Immortality, that "theology is a branch of physics, that physics can infer by calculation the existence of God, and the likelihood of the resurrection of the dead at the end of time..." What all of these theories have in common, of course, is the unique human penchant for inserting ourselves into the cosmos when most of the scientific evidence points the other way: The universe is a cold, unknowing place, a place of Aristotle's unmoved mover, where physical laws operate as if the universe were a giant machine and all the particles cogs. Quantum physics shows us, though, that merely the act of observing particles can change their behavior, so removing conscious perception from equation is equally erroneous since we too are a part of the universe. So, is a middle ground possible? There is certainly a great deal of evidence not explained by the materialistic view of the universe. How can electrons thousands of light years away from each other affect one another? Alain Aspect's 1982 experiment seems to defy Einstein's theory of relativity by showing that "communication" between particles travels faster than the speed of light. From another article on the holographic principle:

Aspect's experiment is related to the EPR Experiment, a consciousness experiment which had been devised by Albert Einstein, and his colleagues, Poldlsky and Rosen, in order to disprove Quantum Mechanics on the basis of the Pauli Exclusion Principle contradicting Special Relativity.

Aspect and his team discovered that under certain circumstances subatomic particles such as electrons are able to instantaneously communicate with each other regardless of the distance separating them. It doesn't matter whether they are 10 feet or 10 billion miles apart.

Somehow each particle always seems to know what the other is doing. The problem with this feat is that it violates Einstein's long-held tenet that no communication can travel faster than the speed of light. Since traveling faster than the speed of light is tantamount to breaking the time barrier, this daunting prospect has caused some physicists to try to come up with elaborate ways to explain away Aspect's findings. But it has inspired others to offer even more radical explanations.

University of London physicist David Bohm, for example, believes Aspect's findings imply that objective reality does not exist, that despite its apparent solidity the universe is at heart a phantasm, a gigantic and splendidly detailed hologram.


The article goes on to give the example, within the framework of the holographic principle, of a watching a fish swimming in a fish tank on two television screens, each showing slightly different angles. One would assume, if the screens were the only information available, that there were two separate fish, but once closer observations revealed corresponding movement, one would realize the the fish had something in common. Perhaps these corresponding electrons are not "communicating" but actually the same electron, separated by our perception of reality as three dimensional. How can human perception be reconciled with physical reality? Is there a true bridge between the mind and matter or is human consciousness some cosmic accident? According to Talbot at least, the holographic principle of the universe seems to answer, or at least answers better than other theories, many of these questions. From perusing just a few of the many articles on the web about the holographic principle, I've found an extraordinary list of phenomena it purports to explain:

- Like Fritjof Capra, this theory is one of "interconnectedness" and at its foundation, the less conservative proponents appear to believe that this will inevitably lead to a new field of science combining neurobiology, psychology, cognitive science, physics, cosmology, astronomy, and possibly even theology.

- String theory and the black hole information paradox will be reconciled and the information from the black holes will be encoded on the 2D "pixels" on the spherical universe (which apparently conforms to the number of dimensions predicted by string theory....I honestly have no idea what this means).

-Consciousness can be said to be a product of the universe that humans have somehow accessed, rather than as a material phenomenon localized entirely within the brain (going even further, this implies that the human mind can manipulate matter, opening the door for all sorts of science fictiony things like telekinesis, telepathy, etc.)

-Objective physical reality is an illusion, created by these pixels on the outside of the "surface" of the universe, conforming to the Hindu concept of reality as Maya, an illusion produced by the self.

-Synchronicity, the occurrence of meaningful coincidences (in time), could be explained as a product of the conscious mind, similar to the correspondence between subatomic particles at a various distances (in space).

OK. So all of this sounds a little ridiculous. And it sort of is. To be fair, most of the scientists currently working within the new paradigm don't subscribe to any of the outlandish claims made by some. This is simply another theory that confirms physical findings and no philosophical claims need be made until more information is available. This could merely be the most recent incarnation of scientifico-religious compromise that has been the norm for centuries, from the early Christian attempt to reconcile Biblical dogma with Neoplatonic philosophy to the medieval Scholastic attempt to maintain Church teaching while submitting to the authority of Aristotelian thinking to Capra and Tipler discovering links between particle physics and cosmology with Eastern philosophy and the Christian concept of an afterlife. It is, historically speaking, nothing new. Still, it's attractive to think of one theory with so much explanatory power. Whether it has a scientific basis or is New Age nonsense, the odd phenomenon people claim to encounter everyday do exist, even if only in our minds, and anything that provides answers to the unexplainable deserves to at least be given a once over.

3 comments:

  1. I will have more to say on this later, but preliminarily, I want to point out that the supernatural (all things theological) can never have a place in science. Why? Because the instant science explains it, it becomes part of the natural world. Anytime people start talking about merging religion and science, I just want to jump off a cliff.

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  2. Hey Justin! Great post, really enjoyed it. I got a kick out of how it took you to several pages of discussing the ideas just to get to get the last paragraph where your specialty of putting everything in the context of history came out. :) Bravo chap

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  3. I really hope FermiLab gets a little bite out of the Stimulus apple. They've had to lay off far too many of their quality people due to underfunding. I really believe the Obama administration is going to make pure science a priority in it's budget strategy, though.

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