Beyond Lee-Huang-Yang description of self-bound Bose mixtures

Understand

We investigate the properties of self-bound ultradilute Bose-Bose mixtures, beyond the Lee-Huang-Yang description.

• Our approach is based on the determination of the beyond mean-field corrections to the phonon modes of the mixture in a self-consistent way and calculation of the associated equation of state.
• The newly obtained ground state energies show excellent agreement with recent quantum Monte Carlo calculations, providing a simple and accurate description of the self-bound mixtures with contact type interaction.
• We further show numerical results for the equilibrium properties of the finite size droplet, by adjusting the Gross-Pitaevskii equation.