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Nazarenko, Sergey, Onorato, Miguel and Proment, Davide 
ORCID: https://orcid.org/0000-0002-9472-0097
(2014)
Bose-Einstein condensation and Berezinskii-Kosterlitz-Thouless transition in the two-dimensional nonlinear Schrödinger model.
Physical Review A, 90 (1).
013624.
ISSN 1050-2947
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Abstract
We analyze the Bose-Einstein condensation process and the Berezinskii-Kosterlitz-Thouless phase transition within the nonlinear Schrödinger model and their interplay with wave turbulence theory. By using numerical experiments we study how the condensate fraction and the first-order correlation function behave with respect to the mass, the energy, and the size of the system. By relating the free-particle energy to the temperature, we are able to estimate the Berezinskii-Kosterlitz-Thouless transition temperature. Below this transition we observe that for a fixed temperature the superfluid fraction appears to be size independent, leading to a power-law dependence of the condensate fraction with respect to the system size.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | physics.flu-dyn,cond-mat.quant-gas,cond-mat.stat-mech |
| Faculty \ School: | Faculty of Science > School of Mathematics |
| UEA Research Groups: | Faculty of Science > Research Groups > Quantum Fluids Faculty of Science > Research Groups > Centre for Photonics and Quantum Science |
| Depositing User: | Pure Connector |
| Date Deposited: | 09 Jun 2014 13:38 |
| Last Modified: | 09 Feb 2023 13:39 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/48630 |
| DOI: | 10.1103/PhysRevA.90.013624 |
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