Comments on quantum gravity and entanglement
By Mark Van Raamsdonk. 2009
267 citations recorded by the source corpus.
In this note, we attempt to provide some insights into the structure of nonperturbative descriptions of quantum gravity using known examples of gaugetheory / gravity duality. We argue that in familiar examples, a quantum description of spacetime can be associated with a manifold-like structure in which particular patches of spacetime are associated with states or density matrices in specific quantum systems. We argue that quantum entanglement between microscopic degrees of freedom plays an essential role in the emergence of a dual spacetime from the nonperturbative degrees of freedom. In particular, in at least some cases, classically connected spacetimes may be understood as particular quantum superpositions of disconnected spacetimes.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics, Statistical and Nonlinear Physics
View Paper: https://www.semanticscholar.org/paper/d350a36d40996cde68028ac319e9d011b3b5c60d
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Citations in the corpus
- An infalling observer in AdS/CFT (2012, result): “Our construction follows important work by several other authors [13, 14, 15, 16, 17, 18, 19, 20].”
- Quantum corrections to holographic entanglement entropy (2013, background): “As explained in [31, 32], a non zero answer is necessary for having non-vanishing correlators.”
- The gravity dual of a density matrix (2012, background): “3 As a particular example, it was pointed out in [4] that a CFT on Sd in a thermal density matrix, commonly understood to be dual to an AdS/Schwarzchild black hole, cannot possibly know whether the whole spacetime is the maximally extended black hole; only the region outside the horizon is common to”
- Entanglement entropy from a holographic viewpoint (2012, background): “It has been pointed out that the holographic entanglement entropy supports the idea of emergent gravity in [185] (see also [186]).”
- Integral geometry and holography (2015, background): “As a result, central tenets of gravitational physics – Einstein’s equations [7– 9], energy conditions [10, 11], even connectedness of spacetime [12–17] – have been reduced to statements about entanglement in the boundary theory.”