Microscopic structure of a quantized vortex core in atomic Fermi gases

M. Machida, Y. Ohashi, and T. Koyama

Phys. Rev. A 74, 023621 – Published 25 August 2006

Abstract

In order to understand what kind of information can be extracted from the vortex-core structure in superfluid fermion-atom gases we make a systematic study for the core structure of a singly quantized vortex in the range of broad Feshbach resonance, solving numerically the generalized Bogoliubov–de Gennes equation derived from the fermion-boson model. Numerical calculations reveal that the vortex core can be well characterized by three length scales from the spatial variation of the fermionic and bosonic gap functions. We also predict that the profile of matter depletion and the quasiparticle spectrum show distinctive differences between the BCS and Bose-Einstein Condensate regimes.

Received 25 April 2006

DOI:https://doi.org/10.1103/PhysRevA.74.023621

Authors & Affiliations

M. Machida^1,2, Y. Ohashi³, and T. Koyama^2,4

¹CCSE, Japan Atomic Energy Agency, 6-9-3 Higashi-Ueno, Taito-ku Tokyo 110-0015, Japan
²CREST (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
³Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-0061, Japan
⁴IMR, Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, Japan

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Issue

Vol. 74, Iss. 2 — August 2006

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