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Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity

The formation of a regular lattice of quantized vortices in a fluid under rotation is a smoking-gun signature of its superfluid nature. Here we study the vortex lattice in a dilute superfluid gas of bosonic atoms at zero temperature along the crossover from the weak-coupling regime, where the inter-...

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Autores principales: Adhikari, S. K., Salasnich, L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5995906/
https://www.ncbi.nlm.nih.gov/pubmed/29891948
http://dx.doi.org/10.1038/s41598-018-27146-1
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author Adhikari, S. K.
Salasnich, L.
author_facet Adhikari, S. K.
Salasnich, L.
author_sort Adhikari, S. K.
collection PubMed
description The formation of a regular lattice of quantized vortices in a fluid under rotation is a smoking-gun signature of its superfluid nature. Here we study the vortex lattice in a dilute superfluid gas of bosonic atoms at zero temperature along the crossover from the weak-coupling regime, where the inter-atomic scattering length is very small compared to the average distance between atoms, to the unitarity regime, where the inter-atomic scattering length diverges. This study is based on high-performance numerical simulations of the time-dependent nonlinear Schrödinger equation for the superfluid order parameter in three spatial dimensions, using a realistic analytical expression for the bulk equation of state of the system along the crossover from weak-coupling to unitarity. This equation of state has the correct weak-coupling and unitarity limits and faithfully reproduces the results of an accurate multi-orbital microscopic calculation. Our numerical predictions of the number of vortices and root-mean-square sizes are important benchmarks for future experiments.
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spelling pubmed-59959062018-06-21 Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity Adhikari, S. K. Salasnich, L. Sci Rep Article The formation of a regular lattice of quantized vortices in a fluid under rotation is a smoking-gun signature of its superfluid nature. Here we study the vortex lattice in a dilute superfluid gas of bosonic atoms at zero temperature along the crossover from the weak-coupling regime, where the inter-atomic scattering length is very small compared to the average distance between atoms, to the unitarity regime, where the inter-atomic scattering length diverges. This study is based on high-performance numerical simulations of the time-dependent nonlinear Schrödinger equation for the superfluid order parameter in three spatial dimensions, using a realistic analytical expression for the bulk equation of state of the system along the crossover from weak-coupling to unitarity. This equation of state has the correct weak-coupling and unitarity limits and faithfully reproduces the results of an accurate multi-orbital microscopic calculation. Our numerical predictions of the number of vortices and root-mean-square sizes are important benchmarks for future experiments. Nature Publishing Group UK 2018-06-11 /pmc/articles/PMC5995906/ /pubmed/29891948 http://dx.doi.org/10.1038/s41598-018-27146-1 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Adhikari, S. K.
Salasnich, L.
Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title_full Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title_fullStr Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title_full_unstemmed Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title_short Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity
title_sort vortex lattice in the crossover of a bose gas from weak coupling to unitarity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5995906/
https://www.ncbi.nlm.nih.gov/pubmed/29891948
http://dx.doi.org/10.1038/s41598-018-27146-1
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