New Oxford paper on foundations of General Relativity

On Jun 13, 2015, at 5:40 PM, JACK SARFATTI <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

"According to a familiar and plausible view, the core of Einstein’s general theory of relativity (GR) is what was, in 1915, a radically new way of understanding gravitation. In pre-relativistic theories, whether Newtonian or specially relativistic, the structure of spacetime is taken to be fixed, varying neither in time nor from solution to solution. Gravitational phenomena are assumed to be the result of the action of gravitational forces, diverting gravitating bodies from the natural motions defined by this fixed spacetime structure. According to GR, in contrast, freely-falling bodies are force free; their trajectories are natural motions. Gravity is understood in terms of a mutable spacetime structure. Bodies act gravitationally on one another by affecting the curvature of spacetime. “Space acts on matter, telling it how to move. In turn, matter reacts back on space, telling it how to curve” (Misner et al., 1973, 5). Note that the first of the claims in the quotation is as true in pre-relativistic theories as it is in GR, at least according to the substantivalist view, which takes spacetime structure in such a theory to be an independent element of reality. The novelty of GR lies in the second claim: spacetime curvature varies, in time (and space) and across models, and the material content of spacetime affects how it does so."

 

In the same way, Bohm’s quantum information pilot field acts on matter, telling it how to move in addition to space. However, in orthodox quantum theory with non-signaling entanglements, matter does not react back on the pilot field. That is the way dead matter in sub-quantum thermal equilibrium behaves. Living matter is out of sub-quantum thermal equilibrium. Quantum gravity is similar - “space” i.e. Einstein’s geometrodynamical field guv also has its Bohm quantum information field, which gains consciousness (qualia) when guv directly reacts back on it. In this sense, we can conceive of a conscious universe. In the world hologram conjecture all of that is happening on the 2D anyonic conformal quantum field theory (topological computing) on our future de Sitter horizon, i.e. dS/CFT duality.

 

 

 

On Jun 13, 2015, at 10:16 AM, JACK SARFATTI <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

This looks good. Thanks. This will affect Lee Smolin’s work I suspect.

 

Abstract Diffeomorphism invariance is sometimes taken to be a criterion of background independence. This claim is commonly accompanied by a second, that the genuine physical magnitudes (the “observables”) of background-independent theories and those of background-dependent (non- diffeomorphism-invariant) theories are essentially different in nature. I argue against both claims. Background-dependent theories can be formulated in a diffeomorphism-invariant manner. This suggests that the nature of the physical magnitudes of relevantly analogous theories (one background free, the other background dependent) is essentially the same. The temptation to think otherwise stems from a misunderstanding of the meaning of spacetime coordinates in background-dependent theories. 

http://stardrive.org
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On Jun 13, 2015, at 7:58 AM, art wagner <This email address is being protected from spambots. You need JavaScript enabled to view it.> wrote:

http://arxiv.org/pdf/1506.03512.pdf