From Euclidean to Lorentzian General Relativity: The Real Way

Details From Euclidean to Lorentzian General Relativity: The Real Way From Euclidean to Lorentzian General Relativity: The Real Way

1996-05-29

arxiv.org/abs/gr-qc/9605066v2

Phys.Rev.D54:1492-1499,1996

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages uuencoded gzipped tar format. Accepted in Phys. Rev. D. Some references added

Scientific paper

10.1103/PhysRevD.54.1492

We study in this paper a new approach to the problem of relating solutions to the Einstein field equations with Riemannian and Lorentzian signatures. The procedure can be thought of as a "real Wick rotation". We give a modified action for general relativity, depending on two real parameters, that can be used to control the signature of the solutions to the field equations. We show how this procedure works for the Schwarzschild metric and discuss some possible applications of the formalism in the context of signature change, the problem of time, black hole thermodynamics...

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