Josephson Oscillations and Self-Trapping of Superfluid Fermions in a Double-Well Potential

Year: 2014

Authors: Zou P., Dalfovo F.

Autors Affiliation: Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.

Abstract: We investigate the behaviour of a two-component Fermi superfluid in a double-well potential. We numerically solve the time dependent Bogoliubov-de Gennes equations and characterize the regimes of Josephson oscillations and self-trapping for different potential barriers and initial conditions. In the weak link limit the results agree with a two-mode model where the relative population and the phase difference between the two wells obey coupled nonlinear Josephson equations. A more complex dynamics is predicted for large amplitude oscillations and large tunneling.

Journal/Review: JOURNAL OF LOW TEMPERATURE PHYSICS

Volume: 177 (5-6)      Pages from: 240  to: 256

More Information: We thank S. Stringari, L. P. Pitaevskii, A. Recati for fruitful discussions. P.Z is particularly indebted to R. G. Scott, whose computational expertise was of great help at the beginning of this work. Support of ERC, through the QGBE Grant, and of Provincia Autonoma di Trento is acknowledged.
KeyWords: Josephson oscillation; Self-trapping; Fermi superfluids; Time-dependent BdG
DOI: 10.1007/s10909-014-1209-2

Citations: 21
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