Overcritical rotation of a trapped Bose-Einstein condensate
Anno: 2001
Autori: Recati A., Zambelli F., Stringari S.
Affiliazione autori: International School of Advanced Studies, Via Beirut 2/4, I-34014 Trieste, Italy;
Dipartimento di Fisica, Università di Trento and Istituto Nazionale per la Fisica della Materia, I-38050 Povo, Italy
Abstract: The rotational motion of an interacting Bose Einstein condensate confined by a harmonic trap is investigated by solving the hydrodynamic equations of superfluids, with the irrotationality constraint for the velocity field. We point out the occurrence of an overcritical branch where the system can rotate with angular velocity larger than the oscillator frequencies. We show that in the case of isotropic trapping the system exhibits a bifurcation from an axisymmetric to a triaxial configuration, as a consequence of the interatomic forces. The dynamical stability of the rotational motion with respect to the dipole and quadrupole oscillations is explicitly discussed.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 86 (3) Da Pagina: 377 A: 380
Parole chiavi: Bose-Eistein condesates; spontaneeous symmetry breaking; Dinamical instabiltiesDOI: 10.1103/PhysRevLett.86.377Citazioni: 121dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-21Riferimenti 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