Spin tensor and its role in non-equilibrium thermodynamics
By F. Becattini, W. Florkowski, E. Speranza. Physics Letters B, 2018
140 citations recorded by the source corpus.
Abstract It is shown that the description of a relativistic fluid at local thermodynamic equilibrium depends on the particular quantum stress-energy tensor operator chosen, e.g., the canonical or symmetrized Belinfante stress-energy tensor. We argue that the Belinfante tensor is not appropriate to describe a relativistic fluid whose macroscopic polarization relaxes slowly to thermodynamic equilibrium and that a spin tensor, like the canonical spin tensor, is required. As a consequence, the description of a polarized relativistic fluid involves an extension of relativistic hydrodynamics including a new antisymmetric rank-two tensor as a dynamical field. We show that the canonical and Belinfante tensors lead to different predictions for measurable quantities such as spectrum and polarization of particles produced in relativistic heavy-ion collisions.
Subfields: Atomic and Molecular Physics, and Optics, Geophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/22705eae0c97916df846fe5e059808bc16e2da1c
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In Atomic and Molecular Physics, and Optics
In Nuclear and High Energy Physics
Citations in the corpus
- Relativistic dissipative spin dynamics in the relaxation time approximation (2020, background): “This situation has triggered many theoretical studies, for example, see [16, 17, 18, 19, 20, 21, 22, 23].”
- Fate of spin polarization in a relativistic fluid: An entropy-current analysis (2019, background): “This implies that the spin potential ω is no longer an independent variable and is completely determined by the thermal vorticity [21, 19].”