Non-local density correlations as signal of Hawking radiation in BEC acoustic black holes

2007/11/30 by Roberto Balbinot, Alessandro Fabbri, Serena Fagnocchi +2 · 1 citation
Physics and Astronomy · #cond-mat.other #gr-qc #hep-th

paper · pdf · doi:10.1103/physreva.78.021603

published as Phys.Rev.A78:021603,2008 · Strongly revised version. 5 pages, 3 eps figures

arxiv created 2008/05/12 · arxiv updated 2009/12/01

Abstract

We have used the analogy between gravitational systems and non-homogeneous fluid flows to calculate the density-density correlation function of an atomic Bose-Einstein condensate in the presence of an acoustic black hole. The emission of correlated pairs of phonons by Hawking-like process results into a peculiar long-range density correlation. Quantitative estimations of the effect are provided for realistic experimental configurations.

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