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Dynamics of quantum quenching for BCS-BEC systems in the shallow-BEC regime

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Abstract

The problem of coupled Fermi-Bose mixtures of an ultracold gas near a narrow Feshbach resonance is approached through the time-dependent and complex Ginzburg-Landau (TDGL) theory. The dynamical system is constructed using Ginzburg-Landau-Abrikosov-Gor’kov (GLAG) path integral methods with the single mode approximation for the composite Bosons. The equilibrium states are obtained in the BEC regime for adiabatic variations of the Feshbach detuning along the stationary solutions of the dynamical system. Investigations into the rich superfluid dynamics of this system in the shallow-BEC regime yield the onset of multiple interference patterns in the dynamics as the system is quenched from the deep-BEC regime. This results in a partial collapse and revival of the coherent matter wave field of the BEC, whose temporal profile is reported.

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  1. S.N. Bose National Centre for Basic Sciences, Sector 3, Block JD, 700098, Salt Lake, Kolkata, India

    Analabha Roy

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  1. Analabha Roy
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Roy, A. Dynamics of quantum quenching for BCS-BEC systems in the shallow-BEC regime. Eur. Phys. J. Plus 127, 34 (2012). https://doi.org/10.1140/epjp/i2012-12034-x

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  • DOI: https://doi.org/10.1140/epjp/i2012-12034-x

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