2011
DOI: 10.1016/j.physc.2011.05.252
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One-dimensional Cooper pairing

Abstract: We study electron pairing in a one-dimensional (1D) fermion gas at zero temperature under zero-and finite-range, attractive, two-body interactions. The binding energy of Cooper pairs (CPs) with zero total or center-of-mass momentum (CMM) increases with attraction strength and decreases with interaction range for fixed strength. The excitation energy of 1D CPs with nonzero CMM display novel, unique properties. It satisfies a dispersion relation with two branches: a phonon-like linear excitation for small CP CMM… Show more

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