FRW/CFT Duality and The Emergence of Time
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- čas přidán 7. 09. 2015
- Speaker(s): Leonard Susskind
Abstract: The FRW/CFT duality is a conjectured duality for Friedmann-Robertson-Walker models inspired by the AdS/CFT correspondence. It assumes that the cosmological constant is exactly zero, which is only the case for models with exact unbroken supersymmetry. Because the energy density does not approach zero as we approach spatial infinity, the metric is not asymptotically flat. This is not an asymptotically cold solution.
Date: 22/09/2009 - 12:30 pm
The Census Taker's Hat [Susskind]: arxiv.org/abs/0710.1129 - Věda a technologie
This is one of the most amazing videos I've ever seen. I just need to watch it 37 more times to understand it.
Aha....I get it now. And that's why bananas are sometimes yellow.
Yes, but the Liouville field, which one could call phenomenological time, describes the evolution of the configurations in CFT which include Minkowski spacetime. So the Liouville field maintains global unitarity.
Very fascinating indeed. Emergence of time rings a familiar tone, that from Penrose's cyclic universes, when one universe ends in a zero mass photon field with time=0.
Indeed. Scale factor in large _a_ limit as emergence of time is very reminiscent of Penrose's conformal rescaling. I wonder if anyone has an arXiv paper pointing this out?
Doesn't lambda small imply SO(3,3) signature?
What are you talking about? SO(n,m) is a Lie group, not a signature. There is no (n,3) signature for n>1 that has any realistic physics.
merci
I respect Proffessor Susskind's ability to teach this type of concept, and so always want to remove my comments on the second reading, because it's no longer the picture I've seen, from the same state of explanation. Superimposed complexity.
If this universe is understood as timespace, then what is observable has to be reverse-history, and the projection process that appears to be emergent time from a Big Bang is somewhat like looking down from above on a water fountain. The surface of the jets are a tangentially flat space in which the "rubber band" vibrating string is the diametric equivalent of the jets in cross section.
If it were not so, then spacetime wouldn't be the dynamic metastable "platform" of geometric timing rates (?).
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On topic, the premise of this talk is proposing that CFT real-time reference-framing of pure-math Quantum-fields Mechanism is absolutely, Theoretically and actually correct, to choose Zero Kelvin as a statement of Actuality, for the configuration of the Holographic Fields to Conform, ie fit the full spectrum fractal-frequency model as posed by a Hydrogen Atomic-> Singularity Structure of Reciproction-recirculation superposition vertices in vortices, resonant-Quiescent and nodal-vibrational emitter-receiver condensation of Logarithmic Time Communication.
1:35 "... #time really does emerge... but it's in a very specific cosmological context..."
@35:20 the context is given, the scale factor _a_ plays the role of time in the large _a_ limit. Which is cosmological because _a_ comes from the FRW metric. (Also can define a local scale factor "time.") Note that it is not the case time "emerges" but rather time has a geometric description in this context.
Quantization, the innate structures and languages arising from the relationship of rates/duration of time measured against itself, is emergent.(?)
Because information is self-defining, (oscillation) duration is the content of relative rates. (Tangential states are geometrical equivalents of synchronous connection, by superposition)
Duality should be considered an alternative word for singular quanta, because it is a measurable uncertainty of integrated rates of wave-change. In use, it depends on the approach from the linearity of languages in qualitative words/math, or the quantitative symbols of geometry, using boundaries/outlines.
Triality, if that's a word, or trinity, would be a logical next step in conjunction with 3D "space", (infinite threeness?), in which the relative combination of numerically quantized geometry is dominated by three combinations of three related coordinates. That's the beginning of compounding. (observation/comment is another duality application, 3D perspective continues the theme)
It is only the beginning but duality implies the virtual objective of relative motion at a vanishing point. Elliptical orbits of planets around stars suggest that the foci are the result of superimposed +/- time cycles that are biased to one rotation direction or the other, and this is the wave integration of every related scale in the temporal continuum; such that the shape of space is lens-like from point to concave to convex, micro vanishing point to macro. (Orthogonal/Normal => renormalization VP)
Is this a sufficient linear-qualitative description of the geometric equivalent to the more holistic de Sitter space concept? Because the Escher diagram fits into the range of possibilities in superposition for a particular frequency distribution, the one that results in the field properties of mass, momentum and energy. Logarithmic multiples of the Pi ratio for example.(?)
Duality is also expressed as coexistence, parallelism. Least time as .dt, reveals co-existing linear duration in a plane of superposition congruence, ..as the cross section of infinity and the axies of lensing.
(Needs a black board full of sketches, ..the basic physics language needs "renomenclaturization"?)
he lost me at FRW (0:30)
still, like the jack as time cone Nicolas tesla 369 seven cardinal directions of space 6 +or-1 intrinsic extrinsic nucleated un nucleated light cone she god the jack. ac/dc electric magnetic wave visible invisible audio, visual in the beginning.