Dynamics of dark solitons in a trapped superfluid Fermi gas

Year: 2011

Authors: Scott R.G., Dalfovo F., Pitaevskii L.P., Stringari S.

Autors Affiliation: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, Via Sommarive 14, I-38123 Povo, Italy;
Kapitza institute for physical problems, Kosygina 2, 119334 Moscow, Russia

Abstract: We study soliton oscillations in a trapped superfluid Fermi gas across the Bose-Einstein condensate to Bardeen-Cooper-Schrieffer (BEC-BCS) crossover. We derive an exact equation for the oscillation period in terms of observable quantities, which we confirm by solving the time-dependent Bogoliubov-de Gennes equations. Hence we reveal the appearance and dynamics of solitons across the crossover, and show that the period dramatically increases as the soliton becomes shallower on the BCS side of the resonance. Finally, we propose an experimental protocol to test our predictions.


Volume: 106 (18)      Pages from: 185301  to: 185301

KeyWords: atomi ultrafreddi
DOI: 10.1103/PhysRevLett.106.185301

Citations: 80
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