Risultati scientifici

Observation of Spin Superfluidity in a Bose Gas Mixture

Anno: 2018

Autori: Fava E., Bienaimé T., Mordini C., Colzi G., Qu C., Stringari S., Lamporesi G., Ferrari G.

Affiliazione autori: INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy; Trento Institute for Fundamental Physics and Applications, INFN, 38123 Povo, Italy

Abstract: The spin dynamics of a harmonically trapped Bose-Einstein condensed binary mixture of sodium atoms is experimentally investigated at finite temperature. In the collisional regime the motion of the thermal component is shown to be damped because of spin drag, while the two condensates exhibit a counterflow oscillation without friction, thereby providing direct evidence for spin superfluidity. Results are also reported in the collisionless regime where the spin components of both the condensate and thermal part oscillate without damping, their relative motion being driven by a mean-field effect. We also measure the static polarizability of the condensed and thermal parts and we find a large increase of the condensate polarizability with respect to the T=0 value, in agreement with the predictions of theory.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 120 (17)      Da Pagina: 170401-1  A: 170401-6

Parole chiavi: spin mixture; spin superfliudity; thermal effect
DOI: 10.1103/PhysRevLett.120.170401

Citazioni: 30
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2021-12-05
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

gdpr-image
This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more