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High Energy Physics - Theory

arXiv:hep-th/9303023 (hep-th)
[Submitted on 3 Mar 1993]

Title:Hawking's chronology protection conjecture: singularity structure of the quantum stress--energy tensor

Authors:Matt Visser
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Abstract: The recent renaissance of wormhole physics has led to a very disturbing observation: If traversable wormholes exist then it appears to be rather easy to to transform such wormholes into time machines. This extremely disturbing state of affairs has lead Hawking to promulgate his chronology protection conjecture. This paper continues a program begun in an earlier paper [Physical Review {\bf D47}, 554--565 (1993), hepth@xxx/9202090]. An explicit calculation of the vacuum expectation value of the renormalized stress--energy tensor in wormhole spacetimes is presented. Point--splitting techniques are utilized. Particular attention is paid to computation of the Green function [in its Hadamard form], and the structural form of the stress-energy tensor near short closed spacelike geodesics. Detailed comparisons with previous calculations are presented, leading to a pleasingly unified overview of the situation.
Comments: plain LaTeX, 13 pages
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
Cite as: arXiv:hep-th/9303023
  (or arXiv:hep-th/9303023v1 for this version)
  https://doi.org/10.48550/arXiv.hep-th/9303023
Journal reference: Nucl.Phys. B416 (1994) 895-906
Related DOI: https://doi.org/10.1016/0550-3213%2894%2990560-6

Submission history

From: Matt Visser [view email]
[v1] Wed, 3 Mar 1993 19:21:44 UTC (11 KB)
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