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Title: Towards a Quantum Monte Carlo-based density functional including finite-range effects: Excitation modes of a 39K quantum droplet
Author: Cikojevic, Viktor
Vranje Markic, L.
Pi Pericay, Martí
Barranco Gómez, Manuel
Boronat Medico, Jordi
Keywords: Matèria condensada
Condensació de Bose-Einstein
Condensed matter
Bose-Einstein condensation
Issue Date: 23-Sep-2020
Publisher: American Physical Society
Abstract: Some discrepancies between experimental results on quantum droplets made of a mixture of 39K 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 20% 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.
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It is part of: Physical Review A, 2020, vol. 102, p. 1-8
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ISSN: 2469-9926
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB))

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