Chronology protection implementation in analogue gravity

DOI: 
10.1140/epjc/s10052-022-10275-3
Publication date: 
08/04/2022
Main author: 
Barceló, Carlos
IAA authors: 
Barceló, Carlos;García-Moreno, Gerardo
Authors: 
Barceló, Carlos;Eguia Sánchez, Jokin;García-Moreno, Gerardo;Jannes, Gil
Journal: 
European Physical Journal C
Refereed: 
Yes
Publication type: 
Article
Volume: 
82
Pages: 
299
Abstract: 
Analogue gravity systems offer many insights into gravitational phenomena, both at the classical and at the semiclassical level. The existence of an underlying Minkowskian structure (or Galilean in the non-relativistic limit) in the laboratory has been argued to directly forbid the simulation of geometries with Closed Timelike Curves (CTCs) within analogue systems. We will show that this is not strictly the case. In principle, it is possible to simulate spacetimes with CTCs whenever this does not entail the presence of a chronological horizon separating regions with CTCs from regions that do not have CTCs. We find an Analogue-gravity Chronology protection mechanism very similar in spirit to Hawking's Chronology Protection hypothesis. We identify the universal behaviour of analogue systems near the formation of such horizons and discuss the further implications that this analysis has from an emergent gravity perspective. Furthermore, we build explicit geometries containing CTCs, for instance spacetimes constructed from two warp-drive configurations, that might be useful for future analysis, both from a theoretical and an experimental point of view.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2022EPJC...82..299B/abstract
ADS Bibcode: 
2022EPJC...82..299B
Keywords: 
General Relativity and Quantum Cosmology;Condensed Matter - Other Condensed Matter;High Energy Physics - Theory