Dark solitons in a superfluid Fermi gas

Journal Article · Mon Oct 15 00:00:00 EDT 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.043610· OSTI ID:21020777

Antezza, Mauro; Dalfovo, Franco; Stringari, Sandro ^[1]; Pitaevskii, Lev P ^[1]

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1. Dipartimento di Fisica, Universita di Trento and CNR-INFM BEC, Via Sommarive 14, I-38050 Povo (Italy)

We investigate the behavior of dark solitons in a superfluid Fermi gas along the BCS-BEC crossover by solving the Bogoliubov-de Gennes equations and looking for real and odd solutions for the order parameter. We show that in the resonance unitary region, where the scattering length is large, the density profile of the soliton has a deep minimum, differently from what happens in the BCS regime. The superfluid gap is found to be significantly quenched by the presence of the soliton due to the occurrence of Andreev fermionic bound states localized near the nodal plane of the order parameter.

• OSTI ID: 21020777
• Journal Information: Physical Review. A, Vol. 76, Issue 4; Other Information: DOI: 10.1103/PhysRevA.76.043610; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BCS THEORY
BOSE-EINSTEIN CONDENSATION
BOUND STATE
DENSITY
EQUATIONS
FERMI GAS
FERMIONS
MATHEMATICAL SOLUTIONS
ORDER PARAMETERS
SCATTERING LENGTHS
SOLITONS
SUPERFLUIDITY