Quantum density anomaly in optically trapped ultracold gases

Detalhes bibliográficos
Autor(a) principal: Rizzatti, Eduardo Osório
Data de Publicação: 2020
Outros Autores: Barbosa, Marco Aurélio Alves, Barbosa, Marcia Cristina Bernardes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/223054
Resumo: Water, the substance of life, is known for its myriad of anomalous properties, whose origins are still the subject of intense debates. In order to provide a different insight into this problem, we show how its density anomaly can be reproduced using a quantum simulator. In particular, we demonstrate that the Bose-Hubbard model, a paradigm system in quantum mechanics, exhibits an increase in density with temperature at fixed pressure in the regular fluid regime and in the superfluid phase. We propose that the mechanism underlying the anomalies is related to zero-point entropies and ground-state phase transitions. A connection with the typical experimental scales and setups including confinement effects is also addressed. In this scenario, such finding opens a pathway for theoretical and experimental studies of waterlike anomalies in the area of ultracold quantum gases.
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spelling Rizzatti, Eduardo OsórioBarbosa, Marco Aurélio AlvesBarbosa, Marcia Cristina Bernardes2021-06-30T04:24:42Z20201050-2947http://hdl.handle.net/10183/223054001126146Water, the substance of life, is known for its myriad of anomalous properties, whose origins are still the subject of intense debates. In order to provide a different insight into this problem, we show how its density anomaly can be reproduced using a quantum simulator. In particular, we demonstrate that the Bose-Hubbard model, a paradigm system in quantum mechanics, exhibits an increase in density with temperature at fixed pressure in the regular fluid regime and in the superfluid phase. We propose that the mechanism underlying the anomalies is related to zero-point entropies and ground-state phase transitions. A connection with the typical experimental scales and setups including confinement effects is also addressed. In this scenario, such finding opens a pathway for theoretical and experimental studies of waterlike anomalies in the area of ultracold quantum gases.application/pdfengPhysical review. A, Atomic, molecular, and optical physics. New York. Vol. 102, no. 3 (Sep. 2020), 033331, 13 p.Condensação Bose-EinsteinModelo de hubbardPontos criticosSuperfluidezQuantum density anomaly in optically trapped ultracold gasesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001126146.pdf.txt001126146.pdf.txtExtracted Texttext/plain52062http://www.lume.ufrgs.br/bitstream/10183/223054/2/001126146.pdf.txtb47bda38e240ab15772b863eeb4da041MD52ORIGINAL001126146.pdfTexto completo (inglês)application/pdf1797352http://www.lume.ufrgs.br/bitstream/10183/223054/1/001126146.pdffb6fa46b6e3d8c2add96e9d9b23d17d5MD5110183/2230542024-02-07 06:01:42.064208oai:www.lume.ufrgs.br:10183/223054Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-02-07T08:01:42Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Quantum density anomaly in optically trapped ultracold gases
title Quantum density anomaly in optically trapped ultracold gases
spellingShingle Quantum density anomaly in optically trapped ultracold gases
Rizzatti, Eduardo Osório
Condensação Bose-Einstein
Modelo de hubbard
Pontos criticos
Superfluidez
title_short Quantum density anomaly in optically trapped ultracold gases
title_full Quantum density anomaly in optically trapped ultracold gases
title_fullStr Quantum density anomaly in optically trapped ultracold gases
title_full_unstemmed Quantum density anomaly in optically trapped ultracold gases
title_sort Quantum density anomaly in optically trapped ultracold gases
author Rizzatti, Eduardo Osório
author_facet Rizzatti, Eduardo Osório
Barbosa, Marco Aurélio Alves
Barbosa, Marcia Cristina Bernardes
author_role author
author2 Barbosa, Marco Aurélio Alves
Barbosa, Marcia Cristina Bernardes
author2_role author
author
dc.contributor.author.fl_str_mv Rizzatti, Eduardo Osório
Barbosa, Marco Aurélio Alves
Barbosa, Marcia Cristina Bernardes
dc.subject.por.fl_str_mv Condensação Bose-Einstein
Modelo de hubbard
Pontos criticos
Superfluidez
topic Condensação Bose-Einstein
Modelo de hubbard
Pontos criticos
Superfluidez
description Water, the substance of life, is known for its myriad of anomalous properties, whose origins are still the subject of intense debates. In order to provide a different insight into this problem, we show how its density anomaly can be reproduced using a quantum simulator. In particular, we demonstrate that the Bose-Hubbard model, a paradigm system in quantum mechanics, exhibits an increase in density with temperature at fixed pressure in the regular fluid regime and in the superfluid phase. We propose that the mechanism underlying the anomalies is related to zero-point entropies and ground-state phase transitions. A connection with the typical experimental scales and setups including confinement effects is also addressed. In this scenario, such finding opens a pathway for theoretical and experimental studies of waterlike anomalies in the area of ultracold quantum gases.
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review. A, Atomic, molecular, and optical physics. New York. Vol. 102, no. 3 (Sep. 2020), 033331, 13 p.
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