Generation of nonground-state Bose-Einstein condensates by modulating atomic interactions
| Autor: | E. R. F. Ramos, Vanderlei Salvador Bagnato, Vyacheslav I. Yukalov, Kílvia Mayre Farias Magalhães, Emanuel Alves de Lima Henn, Kristian Helmerson, J. A. Seman, M. A. Caracanhas |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases education.field_of_study Quantum Physics Population FOS: Physical sciences COLISÕES Scattering length Trapping State (functional analysis) Atomic and Molecular Physics and Optics law.invention Nonlinear system law Modulation Excited state Atomic physics education Quantum Physics (quant-ph) Bose–Einstein condensate |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | A technique is proposed for creating nonground-state Bose-Einstein condensates in a trapping potential by means of the temporal modulation of atomic interactions. Applying a time-dependent spatially homogeneous magnetic field modifies the atomic scattering length. An alternating modulation of the scattering length excites the condensate, which, under special conditions, can be transferred to an excited nonlinear coherent mode. It is shown that there occurs a phase-transition-like behavior in the time-averaged population imbalance between the ground and excited states. The application of the suggested technique to realistic experimental conditions is analyzed and it is shown that the considered effect can be realized for experimentally available condensates. Comment: 6 pages, 2 figures, 1 table |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|