Momentum correlations as signature of sonic Hawking radiation in Bose-Einstein condensates

A. Fabbri (1) , N. Pavloff (2)

1 LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
2 LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques

We study the two-body momentum correlation signal in a quasi one dimensionalBose-Einstein condensate in the presence of a sonic horizon. We identify therelevant correlation lines in momentum space and compute the intensity of thecorresponding signal. We consider a set of different experimental proceduresand identify the specific issues of each measuring process. We show that someinter-channel correlations, in particular the Hawking quantum-partner one, areparticularly well adapted for witnessing quantum non-separability, beingresilient to the effects of temperature and/or quantum quenches.

Mots clés: momentum: correlation; condensation: Bose-Einstein; temperature: effect; radiation: Hawking; horizon: acoustic; dimension: 1; quenching; few-body problem

Domaines: Physique Générale [physics.gen-ph]; Relativité Générale et Cosmologie Quantique [gr-qc]; Physique des Hautes Energies - Théorie [hep-th]

A. Fabbri, N. Pavloff. Momentum correlations as signature of sonic Hawking radiation in Bose-Einstein condensates. SciPost Physics, 2018, 4 (4), pp.019. ⟨10.21468/SciPostPhys.4.4.019⟩. ⟨hal-01774549⟩