Many-body quantum ratchet in a Bose-Einstein condensate
arXiv:cond-mat/0609535 · doi:10.1103/PhysRevA.76.023421
Abstract
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.
4 pages, 4 figures
References in corpus (17)
- Brownian motors: noisy transport far from equilibrium
- Dynamics of collapsing and exploding Bose-Einstein condensates
- Directed current due to broken time-space symmetry
- Bose Einstein Condensate in a Box
- A particle-number-conserving Bogoliubov method which demonstrates the validity of the time-dependent Gross-Pitaevskii equation for a highly condensed Bose gas
- Classical and Quantum Hamiltonian Ratchets
- Molecular Wires Acting as Coherent Quantum Ratchets
- Toroidal optical dipole traps for atomic Bose-Einstein condensates using Laguerre-Gaussian beams
- Quasiperiodically driven ratchets for cold atoms
- Nonlinear Matter Wave Dynamics with a Chaotic Potential
- Transition to Instability in a Kicked Bose-Einstein Condensate
- Quantum ratchets in dissipative chaotic systems
- Transition to Instability in a Periodically Kicked Bose-Einstein Condensate on a Ring
- Nonlinear atom-optical delta-kicked harmonic oscillator using a Bose-Einstein condensate
- Chaotic ratchet dynamics with cold atoms in a pair of pulsed optical lattices
- Dissipationless Directed Transport in Rocked Single-Band Quantum Dynamics
- Quantum resonance and anti-resonance for a periodically kicked Bose-Einstein Condensate in a one dimensional Box
Cited by in corpus (9)
- Artificial Brownian motors: Controlling transport on the nanoscale
- Dynamics of matter-wave solitons in a ratchet potential
- Quantum Ratchets for Quantum Communication with Optical Superlattices
- Coherent ratchets in driven Bose-Einstein condensates
- Steering Bose-Einstein condensates despite time symmetry
- Dynamical instability in kicked Bose-Einstein condensates: Bogoliubov resonances
- Nonlinear resonances in δ-kicked Bose-Einstein Condensates
- Perturbative analysis of coherent quantum ratchets in cold atom systems
- Persistent current by a static non-Hermitian ratchet