Author(s): Francesco Becattini and Carlos Hoyos We obtain a form of the local thermodynamic equilibrium density operator, which is invariant under pseudogauge transformations of the stress-energy and the spin tensors. This operator is an excellent candidate to describe the dynamics of a system that is assumed to achieve local equilibrium from a p… [Phys. Rev. Lett. 137, 041602] Published Thu Jul 23, 2026