Quantum fluctuations around black hole horizons in Bose-Einstein condensates

Year: 2012

Authors: Larré P.-E., Recati A., Carusotto I., Pavloff N.

Autors Affiliation: Univ. Paris Sud, CNRS, Laboratoire de Physique Théorique et Modèles Statistiques, UMR8626, FR-91405 Orsay, France;
INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, via Sommarive 14, IT-38123 Povo, Trento, Italy

Abstract: We study several realistic configurations making it possible to realize an acoustic horizon in the flow of a one-dimensional Bose-Einstein condensate. In each case we give an analytical description of the flow pattern, the spectrum of Hawking radiation, and the associated quantum fluctuations. Our calculations confirm that the nonlocal correlations of the density fluctuations previously studied in a simplified model provide a clear signature of Hawking radiation also in realistic configurations. In addition, we explain by direct computation how this nonlocal signal relates to short-range modifications of the density correlations.


Volume: 85 (1)      Pages from: 013621  to: 013621

More Information: We thank V. E. Kravtsov and C. I. Westbrook for fruitful discussions. This work was supported by the IFRAF Institute, by Grant No. ANR-08-BLAN-0165-01, and by ERC through the QGBE grant. A. R. acknowledges the kind hospitality of the LPTMS in Orsay.
DOI: 10.1103/PhysRevA.85.013621

Citations: 66
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