Trapped Bose-Bose mixtures at finite temperature: A quantum Monte Carlo approach (CROSBI ID 286565)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Dželalija, Krešimir ; Cikojević, Viktor ; Boronat, Jordi ; Vranješ Markić, Leandra
engleski
Trapped Bose-Bose mixtures at finite temperature: A quantum Monte Carlo approach
We study thermal properties of a trapped Bose- Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on temperature for the mixed and separated phases. To this end we use the diffusion Monte Carlo method in the zero-temperature limit and the path-integral Monte Carlo method for finite temperatures. The results obtained are compared with solutions of the coupled Gross-Pitaevskii equations for the mixture at zero temperature. We notice the existence of an anisotropic superfluid density in some phase-separated mixtures. Our results also show that the temperature evolution of the superfluid density and condensate fraction is slightly different, showing noteworthy situations where the superfluid fraction is smaller than the condensate fraction.
Bose gases ; superfluid density ; ultracold gases ; quantum Monte Carlo methods
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Podaci o izdanju
102 (6)
2020.
063304
7
objavljeno
2469-9926
2469-9934
10.1103/physreva.102.063304