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‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons

G.M. Shore, Graham Shore

Nuclear Physics B, Volume: "B460", Issue: 2, Pages: 379 - 396

Swansea University Author: Graham Shore

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DOI (Published version): 10.1016/0550-3213(95)00646-X

Abstract

A number of general issues relating to superluminal photon propagation in gravitational fields are explored. The possibility of superluminal, yet causal, photon propagation arises because of Equivalence Principle violating interactions induced by vacuum polarisation in QED in curved spacetime. Two g...

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Published in: Nuclear Physics B
ISSN: 05503213
Published: 1995
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URI: https://cronfa.swan.ac.uk/Record/cronfa31909
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last_indexed 2018-02-09T05:19:16Z
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spelling 2017-02-09T13:49:27.2626146 v2 31909 2017-02-09 ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons 28a24f55687c82d6f3ee378ead3cf234 Graham Shore Graham Shore true false 2017-02-09 FGSEN A number of general issues relating to superluminal photon propagation in gravitational fields are explored. The possibility of superluminal, yet causal, photon propagation arises because of Equivalence Principle violating interactions induced by vacuum polarisation in QED in curved spacetime. Two general theorems are presented: first, a polarisation sum rule which relates the polarisation averaged velocity shift to the matter energy-momentum tensor and second, a `horizon theorem' which ensures that the geometric event horizon for black hole spacetimes remains a true horizon for real photon propagation in QED. A comparision is made with the equivalent results for electromagnetic birefringence and possible connections between superluminal photon propagation, causality and the conformal anomaly are Journal Article Nuclear Physics B "B460" 2 379 396 05503213 30 4 1995 1995-04-30 10.1016/0550-3213(95)00646-X http://inspirehep.net/record/394547 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2017-02-09T13:49:27.2626146 2017-02-09T13:49:26.8258325 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics G.M. Shore 1 Graham Shore 2
title ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
spellingShingle ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
Graham Shore
title_short ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
title_full ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
title_fullStr ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
title_full_unstemmed ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
title_sort ‘Faster than light’ photons in gravitational fields — Causality, anomalies and horizons
author_id_str_mv 28a24f55687c82d6f3ee378ead3cf234
author_id_fullname_str_mv 28a24f55687c82d6f3ee378ead3cf234_***_Graham Shore
author Graham Shore
author2 G.M. Shore
Graham Shore
format Journal article
container_title Nuclear Physics B
container_volume "B460"
container_issue 2
container_start_page 379
publishDate 1995
institution Swansea University
issn 05503213
doi_str_mv 10.1016/0550-3213(95)00646-X
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
url http://inspirehep.net/record/394547
document_store_str 0
active_str 0
description A number of general issues relating to superluminal photon propagation in gravitational fields are explored. The possibility of superluminal, yet causal, photon propagation arises because of Equivalence Principle violating interactions induced by vacuum polarisation in QED in curved spacetime. Two general theorems are presented: first, a polarisation sum rule which relates the polarisation averaged velocity shift to the matter energy-momentum tensor and second, a `horizon theorem' which ensures that the geometric event horizon for black hole spacetimes remains a true horizon for real photon propagation in QED. A comparision is made with the equivalent results for electromagnetic birefringence and possible connections between superluminal photon propagation, causality and the conformal anomaly are
published_date 1995-04-30T03:39:02Z
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score 11.016235

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