Particle detectors under chronological hazard
Quantum Physics
2024-07-19 v2 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We analyze how the presence of closed timelike curves (CTCs) characterizing a time machine can be discerned by placing a local particle detector in a region of spacetime which is causally disconnected from the CTCs. Our study shows that not only can the detector tell if there are CTCs, but also that the detector can separate topological from geometrical information and distinguish periodic spacetimes without CTCs (like the Einstein cylinder), curvature, and spacetimes with topological identifications that enable time-machines.
Cite
@article{arxiv.2402.17825,
title = {Particle detectors under chronological hazard},
author = {Ana Alonso-Serrano and Erickson Tjoa and Luis J. Garay and Eduardo Martín-Martínez},
journal= {arXiv preprint arXiv:2402.17825},
year = {2024}
}
Comments
20 pages, 3 figures; v2: fixed typos and updated to match published version