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DOE OSTI · 3362997

Perfect spinfluid: A divergence-type approach

Abboud, Nick [University of Illinois Urbana-Champaign, IL (United States)] (ORCID:0000000326629408)·Gavassino, Lorenzo [Vanderbilt University, Nashville, TN (United States)] (ORCID:0000000266039253)·Singh, Rajeev [West University of Timisoara (Romania)] (ORCID:0000000158554039)·Speranza, Enrico [University of Florence, Sesto Fiorentino (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000330766958)
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Abstract

We present a new formulation of nondissipative relativistic spin hydrodynamics that incorporates spin degrees of freedom into the divergence-type theory framework. Due to the divergence-type structure, it is straightforward to enforce nonlinear causality and symmetric hyperbolicity of the equations of motion, ensuring local well-posedness of the initial-value problem and stability of the theory. Furthermore, in a specific realization based on spin kinetic theory, we prove that the equations of motion remain nonlinearly causal and symmetric-hyperbolic to all orders in the spin potential, provided a specific thermodynamic constraint is satisfied. Here, this framework can be applied for numerical simulations to study the dynamics of spin-polarized fluids, such as the quark-gluon plasma in heavy-ion collisions.

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ChiralityQuark-gluon plasmaRelativistic heavy-ion collisionsRelativistic hydrodynamics

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Abboud, Nick [University of Illinois Urbana-Champaign, IL (United States)] (ORCID:0000000326629408), Gavassino, Lorenzo [Vanderbilt University, Nashville, TN (United States)] (ORCID:0000000266039253), Singh, Rajeev [West University of Timisoara (Romania)] (ORCID:0000000158554039), Speranza, Enrico [University of Florence, Sesto Fiorentino (Italy); European Organization for Nuclear Research (CERN), Geneva (Switzerland)] (ORCID:0000000330766958). 2025-11-21. Perfect spinfluid: A divergence-type approach. https://doi.org/10.1103/bngt-lbdv

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