From the superfluid to the Mott regime and back: triggering a non-trivial dynamics in an array of coupled condensates
| dc.creator | Buonsante, P | |
| dc.creator | Franzosi, R | |
| dc.creator | Penna, V | |
| dc.date | 2004-03-09 | |
| dc.date.accessioned | 2026-07-07T02:56:51Z | |
| dc.date.available | 2026-07-07T02:56:51Z | |
| dc.description | We consider a system formed by an array of Bose-Einstein condensates trapped in a harmonic potential with a superimposed periodic optical potential. Starting from the boson field Hamiltonian, appropriate to describe dilute gas of bosonic atoms, we reformulate the system dynamics within the Bose-Hubbard model picture. Then we analyse the effective dynamics of the system when the optical potential depth is suddenly varied according to a procedure applied in many of the recent experiments on superfluid-Mott transition in Bose-Einstein condensates. Initially the condensates' array generated in a weak optical potential is assumed to be in the superfluid ground-state which is well described in terms of coherent states. At a given time, the optical potential depth is suddenly increased and, after a waiting time, it is quickly decreased so that the initial depth is restored. We compute the system-state evolution and show that the potential jump brings on an excitation of the system, incorporated in the final condensate wave functions, whose effects are analysed in terms of two-site correlation functions and of on-site population oscillations. Also we show how a too long waiting time can destroy completely the coherence of the final state making it unobservable. | |
| dc.description | 10 pages, 4 figures, to appear on Journal of Physics B (Special Issue: Levico BEC workshop). Publication status updated | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0403236 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0403236 | |
| dc.identifier | J. Phys. B: At. Mol. Opt. Phys. 37 (2004) S195-S203 | |
| dc.identifier | doi:10.1088/0953-4075/37/7/065 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23490 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | From the superfluid to the Mott regime and back: triggering a non-trivial dynamics in an array of coupled condensates | |
| dc.type | text |