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arXiv · 1603.04702

Numerical study of a recent black hole lasing experiment

M. Tettamanti·S. L. Cacciatori·A. Parola·I. Carusotto
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Abstract

We theoretically analyse a recent experiment reporting the observation of a self-amplifying Hawking radiation in a flowing atomic condensate [J.Steinhauer, Nature Physics, vol.10, pp.864, Nov 2014]. 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.

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M. Tettamanti, S. L. Cacciatori, A. Parola, I. Carusotto. 2016-03-15. Numerical study of a recent black hole lasing experiment. https://doi.org/10.1209/0295-5075/114/60011

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