| Texto completo | |
| Autor(es): |
Montenegro, David
;
Torrieri, Giorgio
Número total de Autores: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW D; v. 100, n. 5, p. 12-pg., 2019-09-17. |
| Resumo | |
Using field theory techniques we analyze the perfect fluid limit, defined as fastest possible local equilibration, in a medium with polarizability, defined as a nonzero local equilibrium partition of angular momentum into spin and vorticity. We show that to restore causality a relaxation term linking vorticity and polarization, analogous to the Israel-Stewart term linking viscous forces and gradients, is required. This term provides the minimum amount of dissipation a locally thermalized relativistic medium with polarizability must have, independently of its underlying degrees of freedom. For materials susceptible to spin alignment an infrared acausal mode remains, which we interpret as a Banks-Casher mode signaling spontaneous transition to a polarized phase. With these ingredients, we propose a candidate for a fully causal Lagrangian of a relativistic polarizable system near the perfect fluid limit, and close with some phenomenological considerations. (AU) | |
| Processo FAPESP: | 17/06508-7 - Desenvolvimento de hidrodinâmica como teoria de campo |
| Beneficiário: | Donato Giorgio Torrieri |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 17/05685-2 - Física hadrônica em colisões nucleares de altas energias |
| Beneficiário: | Jun Takahashi |
| Modalidade de apoio: | Auxílio à Pesquisa - Projetos Especiais |