Massless graviton in a model of quantum gravity with emergent spacetime
High Energy Physics - Theory
2023-07-24 v5 General Relativity and Quantum Cosmology
Abstract
In the model of quantum gravity proposed in JHEP 2020, 70 (2020), dynamical spacetime arises as a collective phenomenon of underlying quantum matter. Without a preferred decomposition of the Hilbert space, the signature, topology and geometry of an emergent spacetime depend upon how the total Hilbert space is partitioned into local Hilbert spaces. In this paper, it is shown that the massless graviton emerges in the spacetime realized from a Hilbert space decomposition that supports a collection of largely unentangled local clocks.
Keywords
Cite
@article{arxiv.2212.14011,
title = {Massless graviton in a model of quantum gravity with emergent spacetime},
author = {Sung-Sik Lee},
journal= {arXiv preprint arXiv:2212.14011},
year = {2023}
}