Transport of a bose gas in 1D disordered lattices at the fluid-insulator transition
Authors: Tanzi L., Lucioni E., Chaudhuri S., Gori L., Kumar A., D’Errico C., Inguscio M., Modugno G.
Autors Affiliation: LENS and Dipartimento di Fisica e Astronomia, Universita` di Firenze, and CNR-INO 50019 Sesto Fiorentino, Italy
Abstract: We investigate the momentum-dependent transport of 1D quasicondensates in quasiperiodic optical lattices. We observe a sharp crossover from a weakly dissipative regime to a strongly unstable one at a disorder-dependent critical momentum. In the limit of nondisordered lattices the observations suggest a contribution of quantum phase slips to the dissipation. We identify a set of critical disorder and interaction strengths for which such critical momentum vanishes, separating a fluid regime from an insulating one. We relate our observation to the predicted zero-temperature superfluid-Bose glass transition.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 111 (11) Pages from: 115301 to: 115301
More Information: We acknowledge discussions with B. Altshuler, I. Danshita, L. Pezze, G. Shlyapnikov, and A. Smerzi. This work was supported by ERC (Grants No. 203479 and No. 247371) and by MIUR (Grants No. PRIN2009FBKLN and No. RBFR12NLNA).KeyWords: Disordered lattices; Interaction strength; Momentum-dependent; Quantum phase; Quasi-periodic; Quasicondensates; Weakly dissipative; Zero temperatures, Crystal lattices; Glass transition, Transport propertiesDOI: 10.1103/PhysRevLett.111.115301Citations: 39data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-01-19References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here