Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory

Details Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory

2001-05-22

arxiv.org/abs/physics/0105072v1

Phys. Rev. A 64, 013605 (2001)

Physics

Atomic Physics

17 pages, 9 figures, Phys. Rev. A 64, 0136XX (2001)

Scientific paper

10.1103/PhysRevA.64.013605

We study the dynamics of a two-mode Bose-Einstein condensate in the vicinity of a mean-field dynamical instability. Convergence to mean-field theory (MFT), with increasing total number of particles $N$, is shown to be logarithmically slow. Using a density matrix formalism rather than the conventional wavefunction methods, we derive an improved set of equations of motion for the mean-field plus the fluctuations, which goes beyond MFT and provides accurate predictions for the leading quantum corrections and the quantum break time. We show that the leading quantum corrections appear as decoherence of the reduced single-particle quantum state; we also compare this phenomenon to the effects of thermal noise. Using the rapid dephasing near an instability, we propose a method for the direct measurement of scattering lengths.

Affiliated with

Also associated with

No associations

Rating

Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics of a two-mode Bose-Einstein condensate beyond mean-field theory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-354243