Fluctuating and dissipative dynamics of dark solitons in quasi-condensates

Details Fluctuating and dissipative dynamics of dark solitons in quasi-condensates Fluctuating and dissipative dynamics of dark solitons in quasi-condensates

2011-07-19

arxiv.org/abs/1107.3855v1

Physics

Condensed Matter

Quantum Gases

17 pages, 14 figures

Scientific paper

The fluctuating and dissipative dynamics of matter-wave dark solitons within harmonically trapped, partially condensed Bose gases is studied both numerically and analytically. A study of the stochastic Gross-Pitaevskii equation, which correctly accounts for density and phase fluctuations at finite temperatures, reveals dark soliton decay times to be lognormally distributed at each temperature, thereby characterizing the previously predicted long lived soliton trajectories within each ensemble of numerical realizations (S.P. Cockburn {\it et al.}, Phys. Rev. Lett. 104, 174101 (2010)). Expectation values for the average soliton lifetimes extracted from these distributions are found to agree well with both numerical and analytic predictions based upon the dissipative Gross-Pitaevskii model (with the same {\it ab initio} damping). Probing the regime for which $0.8 k_{B}T < \mu < 1.6 k_{B}T$, we find average soliton lifetimes to scale with temperature as $\tau\sim T^{-4}$, in agreement with predictions previously made for the low-temperature regime $k_{B}T\ll\mu$. The model is also shown to capture the experimentally-relevant decrease in the visibility of an oscillating soliton due to the presence of background fluctuations.

Affiliated with

Also associated with

No associations

Rating

Fluctuating and dissipative dynamics of dark solitons in quasi-condensates 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 Fluctuating and dissipative dynamics of dark solitons in quasi-condensates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluctuating and dissipative dynamics of dark solitons in quasi-condensates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-33564