Resurgence for the non-conformal Bjorken flow with Fermi-Dirac and Bose-Einstein statistics
arXiv:2212.14506 · doi:10.1103/PhysRevD.110.116020
Abstract
We consider resurgence for the nonconformal Bjorken flow with Fermi-Dirac and Bose-Einstein statistics on the extended relaxation-time approximation. We firstly consider full formal transseries expanded around the equilibrium and then construct the resurgent relation by looking to the structure of Borel transformed ODEs. We form a conjecture of the resurgent relation based on the considerations that Stokes constants constituting of the resurgent relation originate only from singularities of dissipative variables on the Borel plane and that the other variables such as temperature and chemical potential become Borel nonsummable through nonlinear terms with the dissipative variables. We numerically check the conjecture for fundamental variables by explicitly evaluating values of the dominant Stokes constant depending on initial conditions and a particle mass. We also make comments on some issues related to transseries structure and resurgence such as the case of broken symmetry, the massless case, generalized relaxation-time, and attractor solution.
arXiv commentv2: 49 pages, 4 figures, 2 tables, minor corrections
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