Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-10-31
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
PhD Thesis, 205 pages
Scientific paper
The Unruh and Hawking effects are investigated on certain families of topologically non-trivial spacetimes using a variety of techniques. First we present the Bogolubov transformation between Rindler and Minkowski quantizations on two flat spacetimes with topology ${\R}^3\times{S^1}$ (M_0 and M_-) for massive Dirac spinors. The two inequivalent spin structures on each are considered. Results show modifications to the Minkowski space Unruh effect. This provides a flat space model for the Hawking effect on Kruskal and RP^3 geon black hole spacetimes which is the subject of the rest of this part. Secondley we present the expectation values of the stress tensor for massive scalar and spinor fields on $M_0$ and $M_-$, and for massive scalar fields on Minkowski space with a single infinite plane boundary, in the Minkowski-like vacua. Finally we investigate particle detector models. We investigate Schlicht's regularization of the Wightman function and extend it to an arbitrary spacetime dimension, to quotient spaces of Minkowski space, to non-linear couplings, to a massless Dirac field, and to conformally flat spacetimes. Secondly we present some detector responses, including the time dependent responses of inertial and uniformly accelerated detectors on $M_-$ and $M$ with boundary with motion perpendicular to the boundary. Responses are also considered for static observers in the exterior of the RP^3 geon and comoving observers in RP^3 de Sitter space, via those in the associated GEMS.
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