Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures

Abstract We study the equilibrium properties of self-bound droplets in two-dimensional Bose mixtures employing the time-dependent Hartree–Fock–Bogoliubov theory. This theory allows one to understand both the many-body and temperature effects beyond the Lee–Huang–Yang description. We calculate higher...

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Autor principal:	Abdelâali Boudjemâa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1480b1fc07634ddc90f4f7e8c275f829
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spelling	oai:doaj.org-article:1480b1fc07634ddc90f4f7e8c275f8292021-11-08T10:55:43ZMany-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures10.1038/s41598-021-01089-62045-2322https://doaj.org/article/1480b1fc07634ddc90f4f7e8c275f8292021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01089-6https://doaj.org/toc/2045-2322Abstract We study the equilibrium properties of self-bound droplets in two-dimensional Bose mixtures employing the time-dependent Hartree–Fock–Bogoliubov theory. This theory allows one to understand both the many-body and temperature effects beyond the Lee–Huang–Yang description. We calculate higher-order corrections to the excitations, the sound velocity, and the energy of the droplet. Our results for the ground-state energy are compared with the diffusion Monte Carlo data and good agreement is found. The behavior of the depletion and anomalous density of the droplet is also discussed. At finite temperature, we show that the droplet emerges at temperatures well below the Berezinskii–Kosterlitz–Thouless transition temperature. The critical temperature strongly depends on the interspecies interactions. Our study is extended to the finite size droplet by numerically solving the generalized finite-temperature Gross-Pitaevskii equation which is obtained self-consistently from our formalism in the framework of the local density approximation.Abdelâali BoudjemâaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Abdelâali Boudjemâa Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
description	Abstract We study the equilibrium properties of self-bound droplets in two-dimensional Bose mixtures employing the time-dependent Hartree–Fock–Bogoliubov theory. This theory allows one to understand both the many-body and temperature effects beyond the Lee–Huang–Yang description. We calculate higher-order corrections to the excitations, the sound velocity, and the energy of the droplet. Our results for the ground-state energy are compared with the diffusion Monte Carlo data and good agreement is found. The behavior of the depletion and anomalous density of the droplet is also discussed. At finite temperature, we show that the droplet emerges at temperatures well below the Berezinskii–Kosterlitz–Thouless transition temperature. The critical temperature strongly depends on the interspecies interactions. Our study is extended to the finite size droplet by numerically solving the generalized finite-temperature Gross-Pitaevskii equation which is obtained self-consistently from our formalism in the framework of the local density approximation.
format	article
author	Abdelâali Boudjemâa
author_facet	Abdelâali Boudjemâa
author_sort	Abdelâali Boudjemâa
title	Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
title_short	Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
title_full	Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
title_fullStr	Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
title_full_unstemmed	Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures
title_sort	many-body and temperature effects in two-dimensional quantum droplets in bose–bose mixtures
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1480b1fc07634ddc90f4f7e8c275f829
work_keys_str_mv	AT abdelaaliboudjemaa manybodyandtemperatureeffectsintwodimensionalquantumdropletsinbosebosemixtures
_version_	1718442498137784320

Many-body and temperature effects in two-dimensional quantum droplets in Bose–Bose mixtures

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