Non-Hermitian BCS-BEC crossover of Dirac fermions

Non-Hermitian BCS-BEC crossover of Dirac fermions

Abstract We investigate chiral symmetry breaking in a model of Dirac fermions with a complexified coupling constant whose imaginary part represents dissipation. We introduce a chiral chemical potential and observe that for real coupling a relativistic BCS-BEC crossover is realized. We solve the mode...

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Main Author: Takuya Kanazawa
Format: Article
Language:English
Published: SpringerOpen 2021-03-01
Series:Journal of High Energy Physics
Subjects:
Phase Diagram of QCD
Spontaneous Symmetry Breaking
Thermal Field Theory
Online Access:https://doi.org/10.1007/JHEP03(2021)121
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spelling doaj-ff6dad262fd84aabad4b56b3b8887f792021-03-14T12:04:06ZengSpringerOpenJournal of High Energy Physics1029-84792021-03-012021312110.1007/JHEP03(2021)121Non-Hermitian BCS-BEC crossover of Dirac fermionsTakuya Kanazawa0Research and Development Group, Hitachi, Ltd.Abstract We investigate chiral symmetry breaking in a model of Dirac fermions with a complexified coupling constant whose imaginary part represents dissipation. We introduce a chiral chemical potential and observe that for real coupling a relativistic BCS-BEC crossover is realized. We solve the model in the mean-field approximation and construct the phase diagram as a function of the complex coupling. It is found that the dynamical mass increases under dissipation, although the chiral symmetry gets restored if dissipation exceeds a threshold.https://doi.org/10.1007/JHEP03(2021)121Phase Diagram of QCDSpontaneous Symmetry BreakingThermal Field Theory
collection DOAJ
language English
format Article
sources DOAJ
author Takuya Kanazawa
spellingShingle Takuya Kanazawa
Non-Hermitian BCS-BEC crossover of Dirac fermions
Journal of High Energy Physics
Phase Diagram of QCD
Spontaneous Symmetry Breaking
Thermal Field Theory
author_facet Takuya Kanazawa
author_sort Takuya Kanazawa
title Non-Hermitian BCS-BEC crossover of Dirac fermions
title_short Non-Hermitian BCS-BEC crossover of Dirac fermions
title_full Non-Hermitian BCS-BEC crossover of Dirac fermions
title_fullStr Non-Hermitian BCS-BEC crossover of Dirac fermions
title_full_unstemmed Non-Hermitian BCS-BEC crossover of Dirac fermions
title_sort non-hermitian bcs-bec crossover of dirac fermions
publisher SpringerOpen
series Journal of High Energy Physics
issn 1029-8479
publishDate 2021-03-01
description Abstract We investigate chiral symmetry breaking in a model of Dirac fermions with a complexified coupling constant whose imaginary part represents dissipation. We introduce a chiral chemical potential and observe that for real coupling a relativistic BCS-BEC crossover is realized. We solve the model in the mean-field approximation and construct the phase diagram as a function of the complex coupling. It is found that the dynamical mass increases under dissipation, although the chiral symmetry gets restored if dissipation exceeds a threshold.
topic Phase Diagram of QCD
Spontaneous Symmetry Breaking
Thermal Field Theory
url https://doi.org/10.1007/JHEP03(2021)121
work_keys_str_mv AT takuyakanazawa nonhermitianbcsbeccrossoverofdiracfermions
_version_ 1724221628660842496

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