Towards a QMC-based density functional including finite-range effects: excitation modes of a $^{39}$K quantum droplet
Abstract
Some discrepancies between experimental results on quantum droplets made of a mixture of K atoms in different hyperfine states and their analysis within extended Gross-Pitaevskii theory (which incorporates beyond mean-field corrections) have been recently solved by introducing finite-range effects into the theory. Here, we study the influence of these effects on the monopole and quadrupole excitation spectrum of extremely dilute quantum droplets using a density functional built from first-principles quantum Monte Carlo calculations, which can be easily introduced in the existing Gross-Pitaevskii numerical solvers. Our results show differences of up to with those obtained within the extended Gross-Pitaevskii theory, likely providing another way to observe finite-range effects in mixed quantum droplets by measuring their lowest excitation frequencies.
Keywords
Cite
@article{arxiv.2007.06977,
title = {Towards a QMC-based density functional including finite-range effects: excitation modes of a $^{39}$K quantum droplet},
author = {V. Cikojević and L. Vranješ Markić and M. Pi and M. Barranco and J. Boronat},
journal= {arXiv preprint arXiv:2007.06977},
year = {2020}
}