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Reservoir interactions of a vortex in a trapped three-dimensional Bose-Einstein condensate

Lookup NU author(s): Dr Joy AllenORCiD, Professor Nikolaos ProukakisORCiD

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Abstract

We simulate the dissipative evolution of a vortex in a trapped finite-temperature dilute-gas Bose-Einstein condensate using first-principles open-systems theory. Simulations of the complete stochastic projected Gross-Pitaevskii equation for a partially condensed Bose gas containing a single quantum vortex show that the transfer of condensate energy to the incoherent thermal component without population transfer provides an important channel for vortex decay. For the lower temperatures considered, this effect is significantly larger that the population transfer process underpinning the standard theory of vortex decay, and is the dominant determinant of the vortex lifetime. A comparison with the Zaremba-Nikuni-Griffin kinetic (two-fluid) theory further elucidates the role of the particle transfer interaction, and suggests the need for experimental testing of reservoir interaction theory. The dominance of this particular energetic decay mechanism for this open quantum system should be testable with current experimental setups, and its observation would have broad implications for the dynamics of atomic matter waves and experimental studies of dissipative phenomena.

Publication metadata

Author(s): Rooney SJ, Allen AJ, Zulicke U, Proukakis NP, Bradley AS

Publication type: Article

Publication status: Published

Journal: Physical Review A

Year: 2016

Volume: 93

Issue: 6

Online publication date: 02/06/2016

Acceptance date: 14/05/2016

Date deposited: 28/09/2016

ISSN (print): 2469-9926

ISSN (electronic): 2469-9934

Publisher: American Physical Society

URL: http://dx.doi.org/10.1103/PhysRevA.93.063603

DOI: 10.1103/PhysRevA.93.063603

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