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arXiv · 2202.10440

Scalar quantum fields in cosmologies with 2+1 spacetime dimensions

Natalia Sánchez-Kuntz·Álvaro Parra-López·Mireia Tolosa-Simeón·Tobias Haas·Stefan Floerchinger
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Abstract

Motivated by the possibility to use Bose-Einstein condensates as quantum simulators for spacetime curvature, we study a massless relativistic scalar quantum field in spatially curved Friedmann-Lema\^itre-Robertson-Walker universes with $d=2+1$ spacetime dimensions. In particular, we investigate particle production caused by a time-dependent background geometry, by means of the spectrum of fluctuations and several two-point field correlation functions. We derive new analytical results for several expansion scenarios.

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Natalia Sánchez-Kuntz, Álvaro Parra-López, Mireia Tolosa-Simeón, Tobias Haas, Stefan Floerchinger. 2022-02-21. Scalar quantum fields in cosmologies with 2+1 spacetime dimensions. https://doi.org/10.1103/physrevd.105.105020

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