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MODERN CONSENSUS. “Most cosmologists today concur that our universe resembles an FRW universe, one that is infinite, has no boundary and will go on expanding ad infinitum.” (FRW = Friedmann-Robertson-Walker universe). https://lnkd.in/draqjTW View in LinkedIn

“HIGHLY SYMMETRIC and empty, the 5-D antide Sitter universe is hardly like our universe existing in 4-D, filled with matter and radiation and riddled with violent events. Even if we approximate our real universe with one that has matter and radiation spread uniformly throughout, we get not an antide Sitter universe but rather a Friedmann-Robertson-Walker universe.” https://lnkd.in/draqjTW View in LinkedIn

5D VS 4D SPACETIME. “The correspondence works the other way, too. Witten has shown that a black hole in antide Sitter spacetime corresponds to hot radiation in the alternative physics operating on the bounding spacetime. The entropy of the hole--a deeply mysterious concept--equals the radiation's entropy, which is quite mundane.” https://lnkd.in/draqjTW View in LinkedIn

5D VS 4D PARTICLES. “The holographic equivalence can allow a difficult calculation in the 4-D boundary spacetime, such as the behavior of quarks and gluons, to be traded for another, easier calculation in the highly symmetric, 5-D antide Sitter spacetime.” https://lnkd.in/draqjTW View in LinkedIn

5D VS 4D UNIVERSE CREATURES. “Of course, the structures of their brains might give them an overwhelming commonsense prejudice in favor of one description or another, in just the way that our brains construct an innate perception that our universe has three spatial dimensions.” https://lnkd.in/draqjTW View in LinkedIn

ENTROPY. “Furthermore, even if the infinity is tamed, the mysterious dependence of information on surface area must be somehow accommodated.” https://lnkd.in/draqjTW View in LinkedIn

FLAW OF STRING. “Superstring theory also embraces an infinite number of degrees of freedom. Holography restricts the number of degrees of freedom that can be present inside a bounding surface to a finite number; field theory with its infinity cannot be the final story.” https://lnkd.in/draqjTW View in LinkedIn

HOLOGRAPHIC PRINCIPLE. “And with it comes a realization that the fundamental belief, prevalent for 50 years, that field theory is the ultimate language of physics must give way. Fields, such as the electromagnetic field, vary continuously from point to point, and they thereby describe an infinity of degrees of freedom.” https://lnkd.in/draqjTW View in LinkedIn

“RESEARCHERS HAVE proposed many other entropy bounds. The proliferation of variations on the holographic motif makes it clear that the subject has not yet reached the status of physical law. But although the holographic way of thinking is not yet fully understood, it seems to be here to stay.” https://lnkd.in/draqjTW View in LinkedIn

THE HOLOGRAPHIC UNIVERSE. “The entropy of a region uniformly filled with matter and radiation is truly proportional to its volume. A sufficiently large region will therefore violate the holographic bound.” https://lnkd.in/draqjTW View in LinkedIn