Velocity-dependent quantum phase slips in 1D atomic superfluids
Authors: Tanzi L., Scaffidi Abbate S., Cataldini F., Gori L., Lucioni E., Inguscio M., Modugno G., D’Errico C.
Autors Affiliation: LENS and Dipartimento di Fisica e Astronomia, Università di Firenze, 50019 Sesto Fiorentino, Italy;
Istituto Nazionale di Ottica, CNR, 50019 Sesto Fiorentino, Italy.
Abstract: Quantum phase slips are the primary excitations in one-dimensional superfluids and superconductors at low temperatures but their existence in ultracold quantum gases has not been demonstrated yet. We now study experimentally the nucleation rate of phase slips in one-dimensional superfluids realized with ultracold quantum gases, flowing along a periodic potential. We observe a crossover between a regime of temperature-dependent dissipation at small velocity and interaction and a second regime of velocity-dependent dissipation at larger velocity and interaction. This behavior is consistent with the predicted crossover from thermally-assisted quantum phase slips to purely quantum phase slips.
Journal/Review: SCIENTIFIC REPORTS
Volume: 6 Pages from: 25965-1 to: 25965-7
More Information: We acknowledge discussions with N. Fabbri, C. Fort and I. Danshita. This work was supported by the ERC (Grant No. 247371 – DISQUA), by the EU – H2020 research and innovation programme (Grant No. 641122 – QUIC) and by the Italian MIUR (Grant No. RBFR12NLNA – ArtiQuS).KeyWords: Behavior; Gases; Human; Velocity; Nanowires; Superconductivity; Transition; CoherenceDOI: 10.1038/srep25965Citations: 10data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-08-09References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here