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

@article{Kim2016RoleOT, title={Role of thermal friction in relaxation of turbulent Bose-Einstein condensates}, author={Joon Hyun Kim and W. J. Kwon and Yong-il Shin}, journal={Physical Review A}, year={2016}, volume={94}, pages={033612} }

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 $\ensuremath{\alpha}$ 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… Expand

#### 11 Citations

Decay of homogeneous two-dimensional quantum turbulence

- Physics
- 2018

We numerically simulate the free decay of two-dimensional quantum turbulence in a large, homogeneous Bose-Einstein condensate. The large number of vortices, the uniformity of the density profile, and… Expand

Observation of vortex-antivortex pairing in decaying 2D turbulence of a superfluid gas

- Physics, Medicine
- Scientific Reports
- 2017

It is observed that weak spatial pairing between vortices and antivortices develops in the turbulent BEC, which corresponds to the vortex-dipole gas regime predicted for high dissipation, which provides a direct quantitative marker for the survey of various 2D turbulence regimes in the BEC system. Expand

Motion of vortices in inhomogeneous Bose-Einstein condensates

- Physics
- 2017

We derive a general and exact equation of motion for a quantized vortex in an inhomogeneous two-dimensional Bose-Einstein condensate. This equation expresses the velocity of a vortex as a sum of… Expand

Quench dynamics of an ultracold two-dimensional Bose gas

- Physics
- Physical Review A
- 2019

We study the dynamics of a two-dimensional Bose gas after an instantaneous quench of an initially ultracold thermal atomic gas across the Berezinskii-Kosterlitz-Thouless phase transition, confirming… Expand

Finite temperature effects in helical quantum turbulence

- Physics
- 2017

We perform a study on the evolution of helical quantum turbulence at different temperatures by solving numerically the Gross-Pitaevskii and the Stochastic Ginzburg-Landau equations, using up to… Expand

A unified perspective on two-dimensional quantum turbulence and plasticity

- Physics
- 2018

We investigate two-dimensional quantum turbulence and plasticity from a common mathematical perspective, focusing on topological defects as the most important degrees of freedom. Quantum turbulence… Expand

Origin of the inverse energy cascade in two-dimensional quantum turbulence.

- Physics, Mathematics
- Physical review. E
- 2017

A forced and dissipative point vortex model is proposed that captures the turbulent dynamics of quantized vortices by the emergent clustering of same-sign vortice and the inverse energy cascade developing in a statistically neutral system originates from this vortex clustering that evolves with time. Expand

2D quantum turbulence in a polariton quantum fluid

- Physics, Mathematics
- 2020

Abstract The coexistence of the energy and enstrophy cascades in 2D quantum turbulence is one of the important open questions in the studies of quantum fluids. Here, we show that polariton quantum… Expand

Sound emission and annihilations in a programmable quantum vortex collider.

- Physics, Medicine
- Nature
- 2021

This work realizes a programmable vortex collider in a planar, homogeneous atomic Fermi superfluid with tunable inter-particle interactions, suggesting that fermionic quasiparticles localized inside the vortex core contribute significantly to dissipation, thereby opening the route to exploring new pathways for quantum turbulence decay, vortex by vortex. Expand

Annihilation and recurrence of vortex-antivortex pairs in two-component Bose-Einstein condensates

- Physics
- Physical Review A
- 2021

The annihilation of vortex-antivortex pairs is a key event in two-dimensional Bose-Einstein condensates (BECs). It is known that dissipation or a catalyst vortex is required for the annihilation of… Expand

#### References

SHOWING 1-10 OF 57 REFERENCES

Decay of a quantum vortex: Test of nonequilibrium theories for warm Bose-Einstein condensates

- Physics
- 2010

The decay of a vortex from a non-rotating high temperature Bose-Einstein condensate (BEC) is modeled using the stochastic projected Gross-Pitaevskii equation (SPGPE). In order to exploit the… Expand

Thermal friction on quantum vortices in a Bose-Einstein condensate

- Physics
- 2015

We investigate the dissipative dynamics of a corotating vortex pair in a highly oblate axisymmetric Bose-Einstein condensate trapped in a harmonic potential. The initial vortex state is prepared by… Expand

Generation and decay of two-dimensional quantum turbulence in a trapped Bose-Einstein condensate

- Physics
- 2015

In a recent experiment, Kwon et al. [Phys. Rev. A 90, 063627 (2014)] generated a disordered state of quantum vortices by translating an oblate Bose-Einstein condensate past a laser-induced obstacle… Expand

Suppression of Kelvon-induced decay of quantized vortices in oblate Bose-Einstein condensates

- Physics
- 2011

We study the Kelvin mode excitations on a vortex line in a three-dimensional trapped Bose-Einstein condensate at finite temperature. Our stochastic Gross-Pitaevskii simulations show that the… Expand

Finite-temperature vortex dynamics in Bose-Einstein condensates

- Physics
- 2009

We study the decay of vortices in Bose-Einstein condensates at finite temperatures by means of the Zaremba Nikuni Griffin formalism, in which the condensate is modelled by a Gross Pitaevskiiequation,… Expand

Vortex Dynamics in Trapped Bose-Einstein Condensate

- Physics
- 2008

We perform numerical simulations of vortex motion in a trapped Bose-Einstein condensate by solving the two-dimensional Gross-Pitaevskii Equation in the presence of a simple phenomenological model of… Expand

Finite-temperature dynamics of vortices in Bose-Einstein condensates

- Physics
- 2014

We study the dynamics of a single vortex and a pair of vortices in quasi two-dimensional Bose-Einstein condensates at finite temperatures. To this end, we use the stochastic Gross-Pitaevskii… Expand

Real-Time Dynamics of Single Vortex Lines and Vortex Dipoles in a Bose-Einstein Condensate

- Physics, Medicine
- Science
- 2010

The real-time dynamics of quantized vortices in trapped dilute-gas Bose-Einstein condensates are observed by repeatedly imaging the vortex cores and the precession frequency of a single vortex is measured by explicitly observing its time dependence and is found to be in good agreement with theory. Expand

In situ imaging of vortices in Bose-Einstein condensates

- Physics
- 2015

Laboratory observations of vortex dynamics in Bose-Einstein condensates (BECs) are essential for determination of many aspects of superfluid dynamics in these systems. We present a novel application… Expand

Controlled polarization of two-dimensional quantum turbulence in atomic Bose-Einstein condensates

- Physics
- 2016

We propose a scheme for generating two-dimensional turbulence in harmonically trapped atomic condensates with the novelty of controlling the polarization (net rotation) of the turbulence. Our scheme… Expand