Role of thermal friction in relaxation of turbulent Bose-Einstein condensates

Joon Hyun Kim, Woo Jin Kwon, and Y. Shin
Phys. Rev. A 94, 033612 – Published 12 September 2016

Abstract

In recent experiments, the relaxation dynamics of highly oblate, turbulent Bose-Einstein condensates (BECs) was investigated by measuring the vortex decay rates in various sample conditions [Phys. Rev. A 90, 063627 (2014)] and, separately, the thermal friction coefficient α for vortex motion was measured from the long-time evolution of a corotating vortex pair in a BEC [Phys. Rev. A 92, 051601(R) (2015)]. We present a comparative analysis of the experimental results, and find that the vortex decay rate Γ is almost linearly proportional to α. We perform numerical simulations of the time evolution of a turbulent BEC using a point-vortex model equipped with longitudinal friction and vortex-antivortex pair annihilation, and observe that the linear dependence of Γ on α is quantitatively accounted for in the dissipative point-vortex model. The numerical simulations reveal that thermal friction in the experiment was too strong to allow for the emergence of a vortex-clustered state out of decaying turbulence.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 30 June 2016

DOI:https://doi.org/10.1103/PhysRevA.94.033612

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalFluid Dynamics

Authors & Affiliations

Joon Hyun Kim1,2, Woo Jin Kwon2, and Y. Shin1,2,*

  • 1Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul 08826, Korea
  • 2Center for Correlated Electron Systems, Institute for Basic Science, Seoul 08826, Korea

  • *yishin@snu.ac.kr

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 94, Iss. 3 — September 2016

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×