Self-bound Bose mixtures

Description

Ultracold quantum gases usually require a trapping potential to hold the cloud of atoms together. An exception is the case of dipolar quantum gases which can form self-bound droplets, but recent experiments [\ref{cabreraScience17},\ref{semeghini}] found that also binary Bose mixtures can form such self-bound ultra-dilute liquid droplets. These experiments confirmed beyond-mean-fiel d (BMF) predictions [\ref{petrovPRL15},\ref{petrovPRL16}] which used Lee-Huang-Yang corrections in the local density approximation [\ref{larsenAnnPhys63}], see also Ref.[\ref{cikojevicPRB18}]. In our work, we proceed beyond the beyond-mean-field approximation, and study liquid Bose mixtures of $^{39}$K using a variational {\em pair density} functional theory, the hypernetted-chain Euler Lagrange (HNC-EL) method. The HNC-EL methods accounts for correlations non-perturbatively by using a multi-component Jastrow-Feenberg ansatz [\ref{hebenstreitPRA16}]. We focus on the case of a mixture of uniform density, as it would be realized inside large saturated droplets.

Period	25 Jul 2018
Event title	26th International Conference on Atomic Physics
Event type	Conference
Location	SpainShow on map