Universality in ultradilute liquid Bose-Bose mixtures

V. Cikojević, L. Vranješ Markić, G. E. Astrakharchik, and J. Boronat
Phys. Rev. A 99, 023618 – Published 13 February 2019

Abstract

We have studied dilute Bose-Bose mixtures of atoms with attractive interspecies and repulsive intraspecies interactions using quantum Monte Carlo methods at T=0. Using a number of models for interactions, we determine the range of validity of the universal equation of state of the symmetric liquid mixture as a function of two parameters: the s-wave scattering length and the effective range of the interaction potential. It is shown that the Lee-Huang-Yang correction is sufficient only for extremely dilute liquids with the additional restriction that the range of the potential is small enough. Based on the quantum Monte Carlo equation of state we develop a density functional which goes beyond the Lee-Huang-Yang term and use it together with the local density approximation to determine density profiles of realistic self-bound drops.

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  • Received 8 November 2018

DOI:https://doi.org/10.1103/PhysRevA.99.023618

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

V. Cikojević and L. Vranješ Markić*

  • Faculty of Science, University of Split, Ruđera Boškovića 33, HR-21000 Split, Croatia

G. E. Astrakharchik and J. Boronat

  • Departament de Física, Universitat Politècnica de Catalunya, Campus Nord B4-B5, E-08034 Barcelona, Spain

  • *Corresponding author: leandra@pmfst.hr

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Issue

Vol. 99, Iss. 2 — February 2019

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