Modeling time’s arrow. (English) Zbl 1297.83012
Summary: 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.
MSC:
| 83C45 | Quantization of the gravitational field |
| 83C05 | Einstein’s equations (general structure, canonical formalism, Cauchy problems) |
| 94A17 | Measures of information, entropy |
| 83F05 | Relativistic cosmology |
| 62P35 | Applications of statistics to physics |
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