Coherent molecular bound states of bosons and fermions near a Feshbach resonance

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Title: Coherent molecular bound states of bosons and fermions near a Feshbach resonance
Author(s): Drummond, P. D.; Kheruntsyan, K. V.
Abstract: The molecular bound states of atomic quantum gases near a Feshbach resonance were analyzed. It was observed that a renormalizable field-theoretic model for Feshbach coupling has exact solutions for the eigenstate in the low-density two-particle sector. It was shown that the proposed model has the capability to describe a variety of cases with both positive and negative background scattering length. The solutions interpolating between BEC and BCS theories provides a more general variational ansatz for resonant superfluidity and related problems.
Publication type: Journal article
Source: Physical Review A, Vol. 70, no. 3 (2004), article no. 033609
Publication year: 2004
FOR Code(s): 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics; 0204 Condensed Matter Physics; 0205 Optical Physics
Keyword(s): Approximation theory; Atom-molecular systems; BEC; Binding energy; Bose Einstein condensates; Couplings; Eigenfunctions; Eigenvalues; Fermions; Feshbach resonance; Gas condensates; Integral equations; Integration; Molecular dynamics; Quantum theory; Renormalisable theory
Publisher: American Physical Society
ISSN: 1050-2947
Publisher URL: http://dx.doi.org/10.1103/PhysRevA.70.033609
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