Coreless vorticity in multicomponent Bose and Fermi superfluids

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.033629· OSTI ID:21408484

Catelani, G; Yuzbashyan, E A ^[1]

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1. Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)

We consider quantized vortices in two-component Bose-Einstein condensates and three-component Fermi gases with attractive interactions. In these systems, the vortex core can be either empty (normal in the fermion case) or filled with another superfluid. We determine critical values of the parameters--chemical potentials, scattering lengths, and, for Fermi gases, temperature--at which the transition between the two types of vortices occurs. Population imbalance can lead to superfluid core (coreless) vorticity in multicomponent superfluids which otherwise support only usual vortices. For multicomponent Fermi gases, we construct the phase diagram, including regions of coreless vorticity. We extend our results to trapped bosons and fermions using an appropriate local approximation, which goes beyond the usual Thomas-Fermi approximation for trapped bosons.

• OSTI ID: 21408484
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
APPROXIMATIONS
ATOMIC MODELS
BOSE-EINSTEIN CONDENSATION
BOSONS
CALCULATION METHODS
DIAGRAMS
DIMENSIONS
ELASTIC SCATTERING
FERMI GAS
FERMIONS
INFORMATION
INTERACTIONS
LENGTH
MATHEMATICAL MODELS
PHASE DIAGRAMS
POTENTIAL SCATTERING
SCATTERING
SUPERFLUIDITY
THOMAS-FERMI MODEL
TRAPPING
VORTICES