Investigating dirty crossover through fidelity suscepribility and density of states
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12623
International Journal of Modern Physics B
- Department of Physics 
World Scientific Publishing
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.
Khan, A., Basu, S., & Tanatar, B. (2014). Investigating dirty crossover through fidelity susceptibility and density of states. International Journal of Modern Physics B, 28(14), 1450083.