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.
Macroscopic periodic tunneling of Fermi atoms in the BCS-BEC crossover / L. Salasnich, N. Manini, F. Toigo. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 77:4(2008 Apr 04), p. 043609.043609.
Macroscopic periodic tunneling of Fermi atoms in the BCS-BEC crossover
N. ManiniSecondo
;
2008
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.Pubblicazioni consigliate
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