Black-hole lasing in coherently coupled two-component atomic condensates

Year: 2017

Authors: Butera S., Ohberg P., Carusotto I.

Autors Affiliation: Heriot Watt Univ, Inst Photon & Quantum Sci, SUPA, Edinburgh EH14 4AS, Midlothian, Scotland; Univ Trento, CNR BEC Ctr, INO, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy

Abstract: We study theoretically the black-hole lasing phenomenon in a flowing one-dimensional, coherently coupled two-component atomic Bose-Einstein condensate whose constituent atoms interact via a spin-dependent s-wave contact interaction. We show by a numerical analysis the onset of the dynamical instability in the spin branch of the excitations, once a finite supersonic region is created in this branch. We study both a spatially homogeneous geometry and a harmonically trapped condensate. Experimental advantages of the two-component configuration are pointed out, with an eye towards studies of backreaction phenomena

Journal/Review: PHYSICAL REVIEW A

Volume: 96 (1)      Pages from: 013611-1  to: 013611-17

KeyWords: HAWKING RADIATION; SONIC ANALOG; EVAPORATION; FREQUENCIES; GRAVITY; GASES
DOI: 10.1103/PhysRevA.96.013611

Citations: 6
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