Numerical study of a recent black-hole lasing experiment
Anno: 2016
Autori: Tettamanti M., Cacciatori SL., Parola A., Carusotto I.
Affiliazione autori: 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
Giornale/Rivista: EPL
Volume: 114 (6) Da Pagina: 60011-1 A: 60011-6
Parole chiavi: ANALOG; GASESDOI: 10.1209/0295-5075/114/60011Citazioni: 25dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-03-24Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui