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Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field
We show that an imaginary magnetic field (IMF), which can be generated in non-Hermitian systems with spin-dependent dissipations, can greatly enhance the s-wave pairing and superfluidity of spin-1/2 fermions, in distinct contrast to the effect of a real magnetic field. The enhancement can be attribu...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463221/ https://www.ncbi.nlm.nih.gov/pubmed/30986690 http://dx.doi.org/10.1016/j.isci.2019.03.031 |
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author | Zhou, Lihong Cui, Xiaoling |
author_facet | Zhou, Lihong Cui, Xiaoling |
author_sort | Zhou, Lihong |
collection | PubMed |
description | We show that an imaginary magnetic field (IMF), which can be generated in non-Hermitian systems with spin-dependent dissipations, can greatly enhance the s-wave pairing and superfluidity of spin-1/2 fermions, in distinct contrast to the effect of a real magnetic field. The enhancement can be attributed to the increased coupling constant in low-energy space and the reduced spin gap in forming singlet pairs. We have demonstrated this effect in a number of different fermion systems with and without spin-orbit coupling, using both the two-body exact solution and many-body mean-field theory. Our results suggest an alternative route toward strong fermion superfluid with high superfluid transition temperature. |
format | Online Article Text |
id | pubmed-6463221 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-64632212019-04-22 Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field Zhou, Lihong Cui, Xiaoling iScience Article We show that an imaginary magnetic field (IMF), which can be generated in non-Hermitian systems with spin-dependent dissipations, can greatly enhance the s-wave pairing and superfluidity of spin-1/2 fermions, in distinct contrast to the effect of a real magnetic field. The enhancement can be attributed to the increased coupling constant in low-energy space and the reduced spin gap in forming singlet pairs. We have demonstrated this effect in a number of different fermion systems with and without spin-orbit coupling, using both the two-body exact solution and many-body mean-field theory. Our results suggest an alternative route toward strong fermion superfluid with high superfluid transition temperature. Elsevier 2019-04-03 /pmc/articles/PMC6463221/ /pubmed/30986690 http://dx.doi.org/10.1016/j.isci.2019.03.031 Text en © 2019. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Zhou, Lihong Cui, Xiaoling Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title | Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title_full | Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title_fullStr | Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title_full_unstemmed | Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title_short | Enhanced Fermion Pairing and Superfluidity by an Imaginary Magnetic Field |
title_sort | enhanced fermion pairing and superfluidity by an imaginary magnetic field |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6463221/ https://www.ncbi.nlm.nih.gov/pubmed/30986690 http://dx.doi.org/10.1016/j.isci.2019.03.031 |
work_keys_str_mv | AT zhoulihong enhancedfermionpairingandsuperfluiditybyanimaginarymagneticfield AT cuixiaoling enhancedfermionpairingandsuperfluiditybyanimaginarymagneticfield |