Quenched Dynamics of the Momentum Distribution of the Unitary Bose Gas
Autori: Ancilotto F., Rossi M., Salasnich L., Toigo F.
Affiliazione autori: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35122 Padua, Italy; Univ Padua, CNISM, I-35122 Padua, Italy; CNR, IOM Democritos, I-34136 Trieste, Italy; CNR, INO, I-50019 Sesto Fiorentino, Italy.
Abstract: We study the quenched dynamics of the momentum distribution of a unitary Bose gas under isotropic harmonic confinement within a time-dependent density functional approach based on our recently calculated Monte Carlo bulk equation of state. In our calculations the inter-atomic s-wave scattering length of the trapped bosons is suddenly increased to a very large value and the real-time evolution of the system is studied. Prompted by the very recent experimental data of Rb-85 atoms at unitarity (Makotyn et al. in Nat Phys 10:116, 2014) we focus on the momentum distribution as a function of time. Our results suggest that at low momenta, a quasi-stationary momentum distribution is reached after a long transient, contrary to what found experimentally for large momenta which equilibrate on a time scale shorter than the one for three body losses.
Giornale/Rivista: FEW-BODY SYSTEMS
Volume: 56 (11-12) Da Pagina: 801 A: 807
Parole chiavi: SYSTEMS; VORTEXDOI: 10.1007/s00601-015-0971-2Citazioni: 8dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2021-12-05Riferimenti 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