Origin of time and probability in quantum cosmology
General Relativity and Quantum Cosmology
2025-06-24 v1 High Energy Physics - Theory
Quantum Physics
Abstract
We discuss how the classical notions of time and causal structure may emerge together with quantum-mechanical probabilities from a universal quantum state. For this, the process of decoherence between semiclassical branches is important. Our discussion is based on quantum geometrodynamics, a canonical approach to quantum gravity. In this framework, a particular boundary condition may illuminate the issue of the arrow of (classical) time in connection to the growth of entanglement entropy.
Cite
@article{arxiv.2503.10752,
title = {Origin of time and probability in quantum cosmology},
author = {Leonardo Chataignier and Claus Kiefer and Mritunjay Tyagi},
journal= {arXiv preprint arXiv:2503.10752},
year = {2025}
}
Comments
Contribution to appear in the proceedings of the 11th International Workshop DICE2024, "Spacetime - Matter - Quantum Mechanics'', Castiglioncello (Tuscany), 16-20 September 2024