Journal
PHYSICS LETTERS B
Volume 795, Issue -, Pages 100-106Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2019.05.040
Keywords
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Funding
- China Postdoctoral Science Foundation [2016M590312, 2017T100266]
- Special Postdoctoral Researchers Program at RIKEN
- RIKEN iTHEMS Program
- iTHEMS STAMP working group
- Japan Society of Promotion of Science (JSPS) [18H01217]
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) [S1511006]
- Young 1000 Talents Program of China, NSFC [11535012, 11675041]
- NSFC [11847206]
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We derive relativistic hydrodynamic equations with a dynamical spin degree of freedom on the basis of an entropy-current analysis. The first and second laws of local thermodynamics constrain possible structures of the constitutive relations including a spin current and the antisymmetric part of the (canonical) energy-momentum tensor. Solving the obtained hydrodynamic equations within the linear-mode analysis, we find spin-diffusion modes, indicating that spin density is damped out after a characteristic time scale controlled by transport coefficients introduced in the antisymmetric part of the energy-momentum tensor in the entropy-current analysis. This is a consequence of mutual convertibility between spin and orbital angular momentum. (C) 2019 The Author(s). Published by Elsevier B.V.
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