Thermal fermionic quantum field in a static background gauge potential - art. no. 105034

We study at finite temperature the Green function and energy-momentum tenso r T-mu nu(x) of a spinor field in 1+1 dimensions, interacting with a static background electric field. T-mu nu separates into a UV divergent part repr esenting the virtual sea, and a UV finite part describing the thermal plasm a of the spinor field. From T-mu nu we find that the virtual sea remains un iform in the presence of a uniform electric field E, while the thermal plas ma becomes position dependent. This remarkable property of the thermal plas ma is found to be related to the topological properties of the manifold, an d to the presence of zero modes. [S0556-2821(99)03622-X].