Macroscopic periodic tunneling of Fermi atoms in the BCS-BEC crossover

Year: 2008

Authors: Salasnich L., Manini N, Toigo F.

Autors Affiliation: CNR-INFM, Via Marzolo 8 Padova, Italy;
Dipartimento di fisica and CNISM, Universitą di Milano, Via Celoria 16, 20133 Milano Italy;
Dipartimento di fisica “Galileo Galilei” and CNISM, Universitą di Padova, – Via Marzolo 8 Padova, Italy; Organization-

Abstract: We study the macroscopic quantum tunneling of two weakly linked superfluids made of interacting fermionic atoms. We derive atomic Josephson junction equations and find that zero-mode and pi-mode frequencies of coherent atomic oscillations depend on the tunneling coefficient and the sound velocity of the superfluid. By considering a superfluid of K-40 atoms, we calculate these oscillation frequencies in the crossover from the Bardeen-Cooper-Schrieffer state of weakly bound Cooper pairs to the Bose-Einstein condensate of strongly bound molecular dimers.

Journal/Review: PHYSICAL REVIEW A

Volume: 77 (4)      Pages from: 043609  to: 043609

KeyWords: bcs-bec crossover
DOI: 10.1103/PhysRevA.77.043609

ImpactFactor: 2.908
Citations: 46
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