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Universe 2017, 3(3), 54; doi:10.3390/universe3030054

Non-Linear Stationary Solutions in Realistic Models for Analog Black-Hole Lasers

Department of Physics, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel
Academic Editors: Gonzalo J. Olmo and Diego Rubiera-Garcia
Received: 9 March 2017 / Revised: 25 June 2017 / Accepted: 4 July 2017 / Published: 10 July 2017
(This article belongs to the Collection Open Questions in Black Hole Physics)
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Abstract

From both a theoretical and an experimental point of view, Bose–Einstein condensates are good candidates for studying gravitational analogues of black holes and black-hole lasers. In particular, a recent experiment has shown that a black-hole laser configuration can be created in the laboratory. However, the most considered theoretical models for analog black-hole lasers are quite difficult to implement experimentally. In order to fill this gap, we devote this work to present more realistic models for black-hole lasers. For that purpose, we first prove that, by symmetrically extending every black-hole configuration, one can obtain a black-hole laser configuration with an arbitrarily large supersonic region. Based on this result, we propose the use of an attractive square well and a double delta-barrier, which can be implemented using standard experimental tools, for studying black-hole lasers. We also compute the different stationary states of these setups, identifying the true ground state of the system and discussing the relation between the obtained solutions and the appearance of dynamical instabilities. View Full-Text
Keywords: black holes; quantum field theory in curved spacetime; Bose-Einstein condensates; quantum transport, atomtronics black holes; quantum field theory in curved spacetime; Bose-Einstein condensates; quantum transport, atomtronics
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de Nova, J.R.M. Non-Linear Stationary Solutions in Realistic Models for Analog Black-Hole Lasers. Universe 2017, 3, 54.

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