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Title: Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover

Abstract

We have analyzed a single vortex at T=0 in a 3D superfluid atomic Fermi gas across a Feshbach resonance. On the BCS side, the order parameter varies on two scales: k{sub F}{sup -1} and the coherence length {xi}, while only variation on the scale of {xi} is seen away from the BCS limit. The circulating current has a peak value j{sub max} which is a nonmonotonic function of 1/k{sub F}a{sub s} implying a maximum critical velocity {approx}v{sub F} at unitarity. The number of fermionic bound states in the core decreases as we move from the BCS to the BEC regime. Remarkably, a bound state branch persists even on the BEC side reflecting the composite nature of bosonic molecules.

Authors:
; ;  [1]
  1. Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States)
Publication Date:
OSTI Identifier:
20778764
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 96; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevLett.96.090403; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BCS THEORY; BOSE-EINSTEIN CONDENSATION; BOUND STATE; COHERENCE LENGTH; CRITICAL VELOCITY; FERMI GAS; FERMIONS; FUNCTIONS; ORDER PARAMETERS; RESONANCE; SUPERFLUIDITY; UNITARITY; VORTICES

Citation Formats

Sensarma, Rajdeep, Randeria, Mohit, and Ho, T -L. Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover. United States: N. p., 2006. Web. doi:10.1103/PHYSREVLETT.96.0.
Sensarma, Rajdeep, Randeria, Mohit, & Ho, T -L. Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover. United States. https://doi.org/10.1103/PHYSREVLETT.96.0
Sensarma, Rajdeep, Randeria, Mohit, and Ho, T -L. 2006. "Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover". United States. https://doi.org/10.1103/PHYSREVLETT.96.0.
@article{osti_20778764,
title = {Vortices in Superfluid Fermi Gases through the BEC to BCS Crossover},
author = {Sensarma, Rajdeep and Randeria, Mohit and Ho, T -L},
abstractNote = {We have analyzed a single vortex at T=0 in a 3D superfluid atomic Fermi gas across a Feshbach resonance. On the BCS side, the order parameter varies on two scales: k{sub F}{sup -1} and the coherence length {xi}, while only variation on the scale of {xi} is seen away from the BCS limit. The circulating current has a peak value j{sub max} which is a nonmonotonic function of 1/k{sub F}a{sub s} implying a maximum critical velocity {approx}v{sub F} at unitarity. The number of fermionic bound states in the core decreases as we move from the BCS to the BEC regime. Remarkably, a bound state branch persists even on the BEC side reflecting the composite nature of bosonic molecules.},
doi = {10.1103/PHYSREVLETT.96.0},
url = {https://www.osti.gov/biblio/20778764}, journal = {Physical Review Letters},
issn = {0031-9007},
number = 9,
volume = 96,
place = {United States},
year = {Fri Mar 10 00:00:00 EST 2006},
month = {Fri Mar 10 00:00:00 EST 2006}
}