Velocity-dependent quantum phase slips in 1D atomic superfluids

Anno: 2016

Autori: Tanzi L., Scaffidi Abbate S., Cataldini F., Gori L., Lucioni E., Inguscio M., Modugno G., D’Errico C.

Affiliazione autori: 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.

Giornale/Rivista: SCIENTIFIC REPORTS

Volume: 6      Da Pagina: 25965-1  A: 25965-7

Maggiori informazioni: 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).
Parole chiavi: Behavior; Gases; Human; Velocity; Nanowires; Superconductivity; Transition; Coherence
DOI: 10.1038/srep25965

Citazioni: 12
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-05-22
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui