2011/04/14 by Karen Wright, K. J. Wright, Ashton S. Bradley +3
Physics and Astronomy · #Bose–Einstein condensate #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Homogeneous #Noise (video) #Nonlinear system #Physics #Quantum Gases (cond-mat.quant-gas) #Quantum Physics (quant-ph) #Quantum electrodynamics #Quantum mechanics #Quantum, superfluid, helium dynamics #Soliton #Statistical Mechanics (cond-mat.stat-mech) #Statistical physics #Strong Light-Matter Interactions #Thermal #Thermal fluctuations #Thermodynamics #cond-mat.quant-gas #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.48550/arxiv.1104.2691
13 pages, 7 figures
openalex publication_date 2011/04/14 · arxiv created 2011/06/29 · arxiv updated 2011/07/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the decay of a dark soliton in a homogeneous Bose-Einstein condensate. We give an analytical treatment of a decaying soliton, deriving an expression for the soliton velocity and decay time in the absence of thermal noise. We test the result against numerical simulations of a spatially confined system and find good agreement in the regime of low temperature (kBT≪ μ). Thermal fluctuations are found to slow the escape of the soliton, extending its lifetime beyond the predictions of the noise-free theory; the effect becomes significant at a characteristic temperature kBT∼ μ. This stabilization by noise allows us to infer an analytical lower bound for the dark soliton decay time.