Dynamic splitting of a Bose-Einstein condensate
Year: 2001
Authors: Menotti C., Anglin J.R., Cirac J.I., Zoller P.
Autors Affiliation: Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria; Scuola Normale Super Pisa, I-56126 Pisa, Italy; Univ Pisa, Dipartimento Fis, Unita INFM, I-56126 Pisa, Italy; Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02135 USA.
Abstract: We study the dynamic process of splitting a condensate by raising a potential barrier in the center of a harmonic trap. We use a two-mode model to describe the phase coherence between the two halves of the condensate. Furthermore, we explicitly consider the spatial dependence of the mode funtions, which varies depending an the potential barrier. This allows us to get the tunneling coupling between the two wells and the on-site energy as a function of the barrier height. Moreover, we can get some insight into the collective modes that are excited by raising the barrier. We describe the internal and external degrees of freedom by variational ansatz. We distinguish the possible regimes as a function of the characteristic parameters of the problem and identify the adiabaticity conditions.
Journal/Review: PHYSICAL REVIEW A
Volume: 63 (2) Pages from: 23601-1 to: 23601-15
KeyWords: Quantum Phase Diffusion; ExcitationsDOI: 10.1103/PhysRevA.63.023601Citations: 83data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-11-17References taken from IsiWeb of Knowledge: (subscribers only)