Numerical study of a recent black-hole lasing experiment
Numerical study of a recent black-hole lasing experiment
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DOI：
10.1209/0295-5075/114/60011
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
M. Tettamanti;S. Cacciatori;Alberto Parola;I. Carusotto
中科院分区：
文献类型：
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作者：
M. Tettamanti;S. Cacciatori;Alberto Parola;I. Carusotto
我们从理论上分析了最近的一项实验，该实验报告了在流动的原子凝聚物中观察到的自放大霍金辐射（Steinhauer J., Nat. Phys）。， 10(2014) 864)。我们能够使用基于平均场Gross-Pitaevskii方程数值解的理论模型准确地再现实验观测结果，该方程不包括物质场的量子涨落。除了证实黑洞激光机制外，我们的研究结果还表明，潜在的动力学不稳定性具有经典的流体动力学起源，并由确定性的种子触发，与过程的非稳态有关，而不是由热波动或零点波动引起的。
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.