Renormalised fermion vacuum expectation values on anti-de Sitter space-time

摘要

The Schwinger-de Witt and Hadamard methods are used to obtain renormalised vacuum expectation values for the fermion condensate, charge current and stress-energy tensor of a quantum fermion field of arbitrary mass on four-dimensional anti-de Sitter space-time. The quantum field is in the global anti-de Sitter vacuum state. The results are compared with those obtained using the Pauli-Villars and zeta-function regularisation methods, respectively. (C) 2015 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license.