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Entropy 2012, 14(4), 614-629;

Modeling Time’s Arrow

National Institute for Theoretical Physics, School of Physics and Centre for Theoretical Physics, University of the Witwatersrand, WITS 2050, Johannesburg, South Africa
Department of Physics, Long Island University, 1 University Plaza, Brooklyn, NY 11201, USA
Department of Physics, Virginia Tech, Blacksburg, VA 24061, USA
Author to whom correspondence should be addressed.
Received: 2 February 2012 / Revised: 13 March 2012 / Accepted: 19 March 2012 / Published: 23 March 2012
(This article belongs to the Special Issue Arrow of Time)
Full-Text   |   PDF [236 KB, uploaded 24 February 2015]


Quantum gravity, the initial low entropy state of the Universe, and the problem of time are interlocking puzzles. In this article, we address the origin of the arrow of time from a cosmological perspective motivated by a novel approach to quantum gravitation. Our proposal is based on a quantum counterpart of the equivalence principle, a general covariance of the dynamical phase space. We discuss how the nonlinear dynamics of such a system provides a natural description for cosmological evolution in the early Universe. We also underscore connections between the proposed non-perturbative quantum gravity model and fundamental questions in non-equilibrium statistical physics. View Full-Text
Keywords: quantum gravity; arrow of time; non-equilibrium physics quantum gravity; arrow of time; non-equilibrium physics
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Jejjala, V.; Kavic, M.; Minic, D.; Tze, C.-H. Modeling Time’s Arrow. Entropy 2012, 14, 614-629.

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