Browsing by Subject "Bcs-bec Crossover"

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    Investigating dirty crossover through fidelity suscepribility and density of states
    (World Scientific Publishing, 2014) Khan, A.; Basu, S.; Tanatar, Bilal
    We investigate the BCS-BEC crossover in an ultracold atomic gas in the presence of disorder. The disorder is incorporated in the mean-field formalism through Gaussian fluctuations. We observe evolution to an asymmetric line-shape of fidelity susceptibility (FS) as a function of interaction coupling with increasing disorder strength which may point to an impending quantum phase transition (QPT). The asymmetric line-shape is further analyzed using the statistical tools of skewness and kurtosis. We extend our analysis to density of states (DOS) for a better understanding of the crossover in the disordered environment.