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arxiv 2507.09249 v2 pith:ENWKWYV7 submitted 2025-07-12 nucl-th cond-mat.stat-mechhep-th

Pseudo-gauge invariant non-equilibrium density operator

classification nucl-th cond-mat.stat-mechhep-th
keywords pseudo-gaugeequilibriuminvariantlocaloperatordensitystateachieve
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We obtain a form of the local thermodynamic equilibrium density operator which is invariant under pseudo-gauge transformations of the stress-energy and the spin tensors. This operator is an excellent candidate to describe the dynamics of a system which is assumed to achieve local equilibrium from a pseudo-gauge invariant quantum state, a situation which is believed to occur, for instance, in nuclear collisions at very high energy. As a consequence of pseudo-gauge invariance, the ambiguity affecting the predictions of mean values of observables from a local equilibrium state can be removed.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Exact expectation values in a boost-invariant fluid of Dirac fermions with finite spin density

    hep-th 2026-04 unverdicted novelty 6.0

    Exact calculations in a boost-invariant free Dirac fermion fluid show spin polarization arises only from finite spin potential, with shear-induced polarization and spin Hall effect absent.

  2. Gaussian pseudogauge invariant hydrodynamics with spin

    hep-th 2026-04 unverdicted novelty 5.0

    A formulation of fluctuating hydrodynamics with spin is presented that achieves pseudo-gauge invariance and foliation covariance through torsion and second-order gravitational Ward identities.

  3. Spin dynamics and polarization in relativistic systems: recent developments

    nucl-th 2026-05 unverdicted novelty 1.0

    The review summarizes developments in spin hydrodynamics, polarization from spin-vorticity coupling, pseudo-gauge freedom, and heavy-flavor spin dynamics in relativistic systems.