Quantum liquid droplets in a mixture of Bose-Einstein condensates
Anno: 2018
Autori: Cabrera C. R., Tanzi L., Sanz J., Naylor B., Thomas P., Cheiney P., Tarruell L.
Affiliazione autori: ICFO–Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.
Abstract: Quantum droplets are small clusters of atoms self-bound by the balance of attractive and repulsive forces. Here, we report on the observation of droplets solely stabilized by contact interactions in a mixture of two Bose-Einstein condensates. We demonstrate that they are several orders of magnitude more dilute than liquid helium by directly measuring their size and density via in situ imaging. We show that the droplets are stablized against collapse by quantum fluctuations and that they require a minimum atom number to be stable. Below that number, quantum pressure drives a liquid-to-gas transition that we map out as a function of interaction strength. These ultradilute isotropic liquids remain weakly interacting and constitute an ideal platform to benchmark quantum many-body theories.
Giornale/Rivista: SCIENCE
Volume: 359 (6373) Da Pagina: 301 A: 304
Parole chiavi: quantum mixtures; quantum dropletsDOI: 10.1126/science.aao5686Citazioni: 448dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-14Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui