Numerical study of a recent black-hole lasing experiment

Year: 2016

Authors: Tettamanti M., Cacciatori SL., Parola A., Carusotto I.

Autors Affiliation: Univ Insubria, Dipartimento Sci & Alta Tecnol, Via Valleggio 11, I-22100 Como, Italy; INFN, Sez Milano, Via Celoria 16, I-20133 Milan, Italy; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy;‎ Univ Trento, Dipartimento Fis, I-38123 Povo, Italy

Abstract: We theoretically analyse a recent experiment reporting the observation of a self-amplifying Hawking radiation in a flowing atomic condensate (STEINHAUER J., Nat. Phys., 10 (2014) 864). We are able to accurately reproduce the experimental observations using a theoretical model based on the numerical solution of a mean-field Gross-Pitaevskii equation that does not include quantum fluctuations of the matter field. In addition to confirming the black-hole lasing mechanism, our results show that the underlying dynamical instability has a classical hydrodynamic origin and is triggered by a seed of deterministic nature, linked to the non-stationary of the process, rather than by thermal or zero-point fluctuations. Copyright (C) EPLA, 2016

Journal/Review: EPL

Volume: 114 (6)      Pages from: 60011-1  to: 60011-6

DOI: 10.1209/0295-5075/114/60011

Citations: 26
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