Hybrid framework of Fermi–Dirac spin hydrodynamics

2025
journal article
article
dc.abstract.enThe paper outlines the hybrid framework of spin hydrodynamics, combining classical kinetic theory with the Israel–Stewart method of introducing dissipation. The local equilibrium expressions for the baryon current, the energy–momentum tensor, and the spin tensor of particles with spin 1/2 following the Fermi–Dirac statistics are obtained and compared with the earlier derived versions where the Boltzmann approximation was used. The expressions in the two cases are found to have the same form, but the coefficients are shown to be governed by different functions. The relative differences between the tensor coefficients in the Fermi–Dirac and Boltzmann cases are found to grow exponentially with the baryon chemical potential. In the proposed formalism, nonequilibrium processes are studied including mathematically possible dissipative corrections. Standard conservation laws are applied, and the condition of positive entropy production is shown to allow for the transfer between the spin and orbital parts of angular momentum.
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki Teoretycznej
dc.contributor.authorDrogosz, Zbigniew - 217072
dc.date.accessioned2025-10-24T12:37:27Z
dc.date.available2025-10-24T12:37:27Z
dc.date.createdat2025-09-11T11:23:26Zen
dc.date.issued2025
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number3
dc.description.versionostateczna wersja wydawcy
dc.description.volume7
dc.identifier.articleid31
dc.identifier.doi10.3390/physics7030031
dc.identifier.eissn2624-8174
dc.identifier.issn2624-8174
dc.identifier.project2022/47/B/ST2/01372
dc.identifier.projectDRC AI
dc.identifier.urihttps://ruj.uj.edu.pl/handle/item/563826
dc.languageeng
dc.language.containereng
dc.rightsUdzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.typeotwarte czasopismo
dc.subject.enrelativistic hydrodynamics
dc.subject.enspin dynamics
dc.subject.enspin fluid
dc.subject.enIsrael–Stewart method
dc.subtypeArticle
dc.titleHybrid framework of Fermi–Dirac spin hydrodynamics
dc.title.journalPhysics
dc.typeJournalArticle
dspace.entity.typePublicationen
dc.abstract.en
The paper outlines the hybrid framework of spin hydrodynamics, combining classical kinetic theory with the Israel–Stewart method of introducing dissipation. The local equilibrium expressions for the baryon current, the energy–momentum tensor, and the spin tensor of particles with spin 1/2 following the Fermi–Dirac statistics are obtained and compared with the earlier derived versions where the Boltzmann approximation was used. The expressions in the two cases are found to have the same form, but the coefficients are shown to be governed by different functions. The relative differences between the tensor coefficients in the Fermi–Dirac and Boltzmann cases are found to grow exponentially with the baryon chemical potential. In the proposed formalism, nonequilibrium processes are studied including mathematically possible dissipative corrections. Standard conservation laws are applied, and the condition of positive entropy production is shown to allow for the transfer between the spin and orbital parts of angular momentum.
dc.affiliation
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki Teoretycznej
dc.contributor.author
Drogosz, Zbigniew - 217072
dc.date.accessioned
2025-10-24T12:37:27Z
dc.date.available
2025-10-24T12:37:27Z
dc.date.createdaten
2025-09-11T11:23:26Z
dc.date.issued
2025
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.number
3
dc.description.version
ostateczna wersja wydawcy
dc.description.volume
7
dc.identifier.articleid
31
dc.identifier.doi
10.3390/physics7030031
dc.identifier.eissn
2624-8174
dc.identifier.issn
2624-8174
dc.identifier.project
2022/47/B/ST2/01372
dc.identifier.project
DRC AI
dc.identifier.uri
https://ruj.uj.edu.pl/handle/item/563826
dc.language
eng
dc.language.container
eng
dc.rights
Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa
dc.rights.licence
CC-BY
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/legalcode.pl
dc.share.type
otwarte czasopismo
dc.subject.en
relativistic hydrodynamics
dc.subject.en
spin dynamics
dc.subject.en
spin fluid
dc.subject.en
Israel–Stewart method
dc.subtype
Article
dc.title
Hybrid framework of Fermi–Dirac spin hydrodynamics
dc.title.journal
Physics
dc.type
JournalArticle
dspace.entity.typeen
Publication
Affiliations

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