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      Entanglement arrow of time in the multiverse

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          Abstract

          In this paper it is presented the model of a multiverse made up of entangled pairs of universes. The arrow of time obtained from the principles of thermodynamics and the arrow of time given by the thermodynamics of entanglement for single universes are analyzed. The latter requires that the single universes expand once they have crossed the quantum barrier at the Euclidean regime. The possible relationship with respect to the grow of local structures in a single universe is also discussed.

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          Boundary conditions in quantum cosmology

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            Arrow of time in cosmology

            S. Hawking (1985)
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              Arrow of time in a recollapsing quantum universe

              We show that the Wheeler-DeWitt equation with a consistent boundary condition is only compatible with an arrow of time that formally reverses in a recollapsing universe. Consistency of these opposite arrows is facilitated by quantum effects in the region of the classical turning point. Since gravitational time dilation diverges at horizons, collapsing matter must then start re-expanding ``anticausally" (controlled by the reversed arrow) before horizons or singularities can form. We also discuss the meaning of the time-asymmetric expression used in the definition of ``consistent histories". We finally emphasize that there is no mass inflation nor any information loss paradox in this scenario.
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                Author and article information

                Journal
                26 March 2012
                2012-04-07
                Article
                1203.5774
                8fb1a1d5-89fc-49a9-bd89-a5bfad04772a

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

                History
                Custom metadata
                6 pages, 1 figure. Some changes have been made in Sec. III and one figure has been removed
                gr-qc hep-th

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