2006/05/24 by Miodrag L. Kulic, Miodrag L. Kulić, Kulic, Miodrag L.
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum, superfluid, helium dynamics #Statistical Mechanics (cond-mat.stat-mech) #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0605604
6 pages, 3 figures, Introduction and List of References updated
openalex publication_date 2006/05/24 · arxiv created 2006/06/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
he BCS-like pairing in ultracold fermionic atomic (UCFAG) gases is studied in the model of "isotopic-spin" pairing proposed in 1991 \cite% Ku-Hof-SSC. This model assumes a mismatch (δ) in chemical potentials of pairing fermionic atoms. It is shown that a π-Josephson junction can be realized in UCFAG systems, where the left and right banks % S are the UCFAG superfluids. The weak link M consists from the normal % UCFAG with the finite mismatch δ. If the π-junction is a part of a closed ring the superfluid mass-current flows spontaneously in the ring, i.e., the time-reversal symmetry is broken spontaneously. This is realized if the radius of the ring R is larger than the critical one % Rc . All these effects exist also in the case when δ≫ Δ, where Δ is the superfluid gap, but with the reduced thickness of the weak link. It is also discussed, that if junctions SM1M2S and trilayers % M1SM2 from UCFAG are realizable this renders a possibility for a novel electronics - hypertronics.