Lessons from Schwinger Effective Action for Black Holes

Abstract

We revisit the Hawking radiation by comparing the effective actions in the in-out formalism, and advance an interpretation of the vacuum polarization and the Hawking radiation. The equivalence exists between the spinor QED effective action in a constant electric field and the nonperturbative effective action of a massless boson on the horizon of a Schwarzschild black hole.

Comments: LaTex 6 pages, 1 figure; ICGAC10, Dec. 17-22, 2011, Quy-Nhon, Vietnam