Dilute quantum liquid in a K-Rb Bose mixture
Abstract
A quantum liquid in a heterogeneous mixture of K and Rb atoms is studied using the diffusion Monte Carlo method and Density Functional Theory. The perturbative Lee-Huang-Yang term for a heterogeneous mixture is verified and it is proved to be valid only near the gas-liquid transition. Based on the equations of state of the bulk mixture, calculated with diffusion Monte Carlo, extensions to Lee-Huang-Yang corrected mean-field energy functionals (MF+LHY) are presented. Using Density Functional Theory, a systematic comparison between different functionals is performed, focusing on the critical atom number, surface tension, surface width, Tolman length, and compressibility. These results are given as a function of the inter-species interaction strength, within the stability domain of the liquid mixture.
Keywords
Cite
@article{arxiv.2107.05905,
title = {Dilute quantum liquid in a K-Rb Bose mixture},
author = {Viktor Cikojević and Elena Poli and Francesco Ancilotto and Leandra Vranješ Markić and Jordi Boronat},
journal= {arXiv preprint arXiv:2107.05905},
year = {2021}
}