Stability of small-amplitude normal modes of a Bose-Einstein condensate with a singly quantized vortex confined in an optical lattice
Anno: 2004
Autori: Bhattacherjee A.B., Morsch O., Arimondo E.
Affiliazione autori: Univ Pisa, Dipartimento Fis E Fermi, INFM, I-56127 Pisa, Italy
Abstract: We study the dynamics of a BEC with a singly quantized vortex, placed in the combined potential of a 1D (2D) optical lattice and an axi-symmetric harmonic trap. A time-dependent variational Lagrangian analysis shows that an optical lattice helps to stabilize the vortex which in the absence of the optical lattice is unstable. We find that the normal modes are stable only if the depth of the optical potential is more than a certain critical value. This critical value of the optical potential depends on the 2D interaction parameter. In general, the higher the interaction parameter, the lower the value of the optical potential required to stabilize the vortex. The BEC with the singly quantized vortex is found to be relatively more unstable in a 2D optical lattice compared to a 1D optical lattice.
Giornale/Rivista: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume: 37 (11) Da Pagina: 2355 A: 2361
Parole chiavi: Bose-Einstein condensationDOI: 10.1088/0953-4075/37/11/012Citazioni: 15dati 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