Quantum fluctuations around black hole horizons in Bose-Einstein condensates

P. -É. Larré (1) , A. Recati (2) , I. Carusotto (2) , N. Pavloff (1)

1 LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
2 INO-CNR BEC Center and Dipartimento di Fisica

We study several realistic configurations allowing 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, of the spectrum of Hawking radiation and of the associated quantum fluctuations. Our calculations confirm that the non local 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 non local signal relates to short range modifications of the density correlations.

Domaines: Formation de Structures et Solitons [nlin.PS]; Gaz Quantiques [cond-mat.quant-gas]; Relativité Générale et Cosmologie Quantique [gr-qc]

P. -É. Larré, A. Recati, I. Carusotto, N. Pavloff. Quantum fluctuations around black hole horizons in Bose-Einstein condensates. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2012, 85, pp.013621. ⟨10.1103/PhysRevA.85.013621⟩. ⟨hal-00661667⟩