Investigating dirty crossover through fidelity susceptibility and density of states
International Journal of Modern Physics B
World Scientific Publishing Co. Pte Ltd
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Please cite this item using this persistent URLhttp://hdl.handle.net/11693/25913
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. © 2014 World Scientific Publishing Company.