Back to the Future: Causality on a Moving Braneworld

Autor:	Greene, Brian, Kabat, Daniel, Levin, Janna, Porrati, Massimo
Rok vydání:	2022
Předmět:	General Relativity and Quantum Cosmology High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.107.025016
Popis:	Brane observers executing appropriate motion through a partially compactified Lorentz invariant bulk spacetime, such as $M_4 \times S^1$, can send signals along the brane that are instantaneous or even travel backward in time. Nevertheless, causality in the braneworld remains intact. We establish these results, which follow from superluminal signal propagation reported in arXiv:2206.13590, through classical analysis and then extend our reasoning by examining quantum mechanical microcausality. One implication is the capacity for real time communication across arbitrarily large distances. Comment: 15 pages. v2: added reference, dependence of effective speed on angle. v3: fixed a minor typo
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2208.09014 Zobrazit plný text záznamu View this record from Arxiv