Published August 2007 | Version v1
Journal article Metadata-only

Interaction-induced quantum ratchet in a Bose-Einstein condensate

Creators

  • 1. Department of Physics and Centre for Computational Science and Engineering, National University of Singapore, Singapore 117542 (Singapore)
  • 2. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, via Celoria 16, 20133 Milan (Italy)
  • 3. CNISM, CNR-INFM and Center for Nonlinear and Complex Systems, Universita degli Studi dell'Insubria, Via Valleggio 11, 22100 Como (Italy)
  • 4. NUS Graduate School for Integrative Sciences and Engineering, 117597 (Singapore)
  • 5. Laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University, 210093 (China)

Description

We study the dynamics of a dilute Bose-Einstein condensate confined in a toroidal trap and exposed to a pair of periodically flashed optical lattices. We first prove that in the noninteracting case this system can present a quantum symmetry which forbids the ratchet effect classically expected. We then show how many-body atom-atom interactions, treated within the mean-field approximation, can break this quantum symmetry, thus generating directed transport

Additional details

Identifiers

DOI
10.1103/PhysRevA.76.023421;
arXiv
arXiv:cond-mat/0609535v1;

Publishing Information

Journal Title
Physical Review. A
Journal Volume
76
Journal Issue
2
Journal Page Range
p. 023421-023421.5
ISSN
1050-2947
CODEN
PLRAAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
39038216
Subject category
S74: ATOMIC AND MOLECULAR PHYSICS;
Descriptors DEI
APPROXIMATIONS; ATOM-ATOM COLLISIONS; ATOMS; BOSE-EINSTEIN CONDENSATION; INTERACTIONS; MANY-BODY PROBLEM; MEAN-FIELD THEORY; PERIODICITY; SYMMETRY; TRAPS
Descriptors DEC
ATOM COLLISIONS; CALCULATION METHODS; COLLISIONS; VARIATIONS

Optional Information

Notes
(c) 2007 The American Physical Society