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September 10, 2025PhysicsOpen Access

Hybrid Framework of Fermi–Dirac Spin Hydrodynamics

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This framework combines classical kinetic theory and the Israel-Stewart method, linking dissipation and spin dynamics.

The framework derives local equilibrium expressions for baryon current and energy-momentum tensor, showing relationships.
Relative differences in tensor coefficients between fermi-dirac and boltzmann cases increase with baryon chemical potential.
Nonequilibrium processes are analyzed, incorporating dissipative corrections and positive entropy production.
The proposed method applies standard conservation laws, allowing transfer between spin and orbital angular momentum parts.

Zbigniew Drogosz (2025) studied this question.

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