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.

Numerical study of a recent black-hole lasing experiment

TETTAMANTI, MANUELE;CACCIATORI, SERGIO LUIGI;PAROLA, ALBERTO;CARUSOTTO, IACOPO
2016-01-01

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.
2016
http://iopscience.iop.org/article/10.1209/0295-5075/114/60011/pdf
Physics and Astronomy (all)
Tettamanti, Manuele; Cacciatori, SERGIO LUIGI; Parola, Alberto; Carusotto, Iacopo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11383/2052075
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