Quantum Monte Carlo-based density functional for one-dimensional Bose-Bose mixtures
Quantum Gases
2023-04-26 v2
Abstract
We propose and benchmark a Gross-Pitaevskii-like equation for two-component Bose mixtures with competing interactions in 1D. Our approach follows the density-functional theory with the energy functional based on the exact Quantum Monte Carlo (QMC) simulations. Our model covers, but goes beyond, the popular approach with the Lee-Huang-Yang corrections. We first benchmark our approach against available QMC data in all interaction regimes and then study dynamical properties, inaccessible by ab initio many-body simulations. Our analysis includes a study of monopole modes and reveals the presence of anomalous dark solitons.
Cite
@article{arxiv.2301.04417,
title = {Quantum Monte Carlo-based density functional for one-dimensional Bose-Bose mixtures},
author = {Jakub Kopyciński and Luca Parisi and Nick G. Parker and Krzysztof Pawłowski},
journal= {arXiv preprint arXiv:2301.04417},
year = {2023}
}
Comments
10 pages, 7 figures