期刊
PHYSICAL REVIEW A
卷 80, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.043603
关键词
black holes; Bose-Einstein condensation; fluctuations
资金
- IFRAF Institute [ANR-08-BLAN-0165-01]
- Ministero dell-Istruzione, dellUniversita e della Ricerca (MIUR)
- EuroQUAM FerMix program
We apply the microscopic Bogoliubov theory of dilute Bose-Einstein condensates to analyze quantum and thermal fluctuations in a flowing atomic condensate in the presence of a sonic horizon. For the simplest case of a step-like horizon, closed-form analytical expressions are found for the spectral distribution of the analog Hawking radiation and for the density correlation function. The peculiar long-distance density correlations that appear as a consequence of the Hawking emission features turns out to be reinforced by a finite initial temperature of the condensate. The analytical results are in good quantitative agreement with first principle numerical calculations.
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