Probing quantum transport by engineering correlations in a speckle potential

Abstract

We develop a procedure to modify the correlations of a speckle potential. This procedure, that is suitable for spatial light modulator devices, allows one to increase the localization efficiency of the speckle in a narrow energy region whose position can be easily tuned. This peculiar energydependent localization behavior is explored by pulling the potential through a cigar-shaped Bose-Einstein condensate. We show that the percentage of dragged atoms as a function of the pulling velocity depends on the potential correlations below a threshold of the disorder strength. Above this threshold, interference effects are no longer clearly observable during the condensate drag.

Impact of Correlated Disorder on Surface Superconductivity: Revealing the Robustness of the Surface Ordering Effect

“…More than a decade ago, authors underscored the significance of correlations in the disorder of superconducting compounds and/or structures in experimental investigations. Such correlations are known to significantly modify key characteristics of various materials. − The research conducted by Bianconi’s group unveiled a pivotal finding in the context of the superconductor lanthanum copper oxide . Their discovery elucidated that the spatial arrangement of oxygen ions in the layers proximate to the copper oxide conforms to the power law.…”