Quantum Signature of Analog Hawking Radiation in Momentum Space

Denis Boiron 1 Fabbri Alessandro 2 Larré Pierre-Elie 3 Nicolas Pavloff 4 Christoph I. Westbrook 1 Pawel Zin 5

Physical Review Letters., 2015, 115 (2), pp.025301. <http://journals.aps.org/prl/>. <10.1103/PhysRevLett.115.025301>

We consider a sonic analog of a black hole realized in the one-dimensional flow of a Bose-Einstein condensate. Our theoretical analysis demonstrates that one- and two-body momentum distributions accessible by present-day experimental techniques provide clear direct evidence (i) of the occurrence of a sonic horizon, (ii) of the associated acoustic Hawking radiation, and (iii) of the quantum nature of the Hawking process. The signature of the quantum behavior persists even at temperatures larger than the chemical potential.

  • 1. Laboratoire Charles Fabry / Optique atomique
  • 2. Centro Fermi - Centro Studi e Ricerche "Enrico Fermi"
  • 3. Dipartimento di Fisica, Universita di Trento
  • 4. LPTMS - Laboratoire de Physique Théorique et Modèles Statistiques
  • 5. National Center for Nuclear Research (NCBJ), Warsaw