Thermal-induced Local Imbalance in Repulsive Binary Bose Mixtures

Abstract

We study repulsive two-component Bose mixtures with equal populations and confined in a finite-size box through path-integral Monte Carlo simulations. For different values of the $s$-wave scattering length of the interspecies potential, we calculate the local population imbalance in a region of fixed volume inside the box at different temperatures. We find two different behaviors: for phase-separated states at $T=0$, thermal effects induce a diffusion process which reduces the local imbalance whereas, for miscible states at $T=0$, a maximum in the local population imbalance appears at a certain temperature, below the critical one. We show that this intriguing behavior is strongly related to the bunching effect associated with the Bose-Einstein statistics of the particles in the mixture and to an unexpected behavior of the cross pair distribution function not reported before.

7 pages, 7 figures

References in corpus (5)

• Quantum liquid droplets in a mixture of Bose-Einstein condensates
• Double species condensate with tunable interspecies interactions
• Worm Algorithm and Diagrammatic Monte Carlo: A New Approach to Continuous-Space Path Integral Monte Carlo Simulations
• Dual-Species Bose-Einstein Condensate of ${}^{87}$Rb and ${}^{133}$Cs
• Quantum Gases in Optical Boxes

Cited by in corpus (2)

• Temperature-induced miscibility of impurities in trapped Bose gases
• Creating and melting a supersolid by heating a quantum dipolar system