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Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation

Graham Shore

Nucl. Phys. B, Volume: 633, Issue: 1-2, Pages: 271 - 294

Swansea University Author: Graham Shore

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DOI (Published version): 10.1016/S0550-3213(02)00240-7

Abstract

Vacuum polarisation in QED in a background gravitational field induces interactions which effectively violate the strong equivalence principle and affect the propagation of light. In the low frequency limit, Drummond and Hathrell have shown that this mechanism leads to superluminal photon velocities...

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Published in: Nucl. Phys. B
Published: 2002
Online Access: http://arxiv.org/abs/gr-qc/0203034
URI: https://cronfa.swan.ac.uk/Record/cronfa17510
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first_indexed 2014-03-21T02:30:09Z
last_indexed 2018-02-09T04:51:11Z
id cronfa17510
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spelling 2014-03-20T23:56:02.8464856 v2 17510 2014-03-20 Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation 28a24f55687c82d6f3ee378ead3cf234 Graham Shore Graham Shore true false 2014-03-20 FGSEN Vacuum polarisation in QED in a background gravitational field induces interactions which effectively violate the strong equivalence principle and affect the propagation of light. In the low frequency limit, Drummond and Hathrell have shown that this mechanism leads to superluminal photon velocities. To confront this phenomenon with causality, however, it is necessary to extend the calculation of the phase velocity vph(ω) to high frequencies, since it is vph(∞) which determines the characteristics of the effective wave equation and thus the causal structure. In this paper, we use a recently constructed expression, valid to all orders in a derivative expansion, for the effective action of QED in curved spacetime to determine the frequency dependence of the phase velocity and investigate whether superluminal velocities indeed persist in the high frequency limit. Journal Article Nucl. Phys. B 633 1-2 271 294 24 6 2002 2002-06-24 10.1016/S0550-3213(02)00240-7 http://arxiv.org/abs/gr-qc/0203034 COLLEGE NANME Science and Engineering - Faculty COLLEGE CODE FGSEN Swansea University 2014-03-20T23:56:02.8464856 2014-03-20T23:22:57.6667420 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics Graham Shore 1
title Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
spellingShingle Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
Graham Shore
title_short Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
title_full Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
title_fullStr Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
title_full_unstemmed Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
title_sort Faster than Light Photons in Gravitational Fields II – Dispersion and Vacuum Polarisation
author_id_str_mv 28a24f55687c82d6f3ee378ead3cf234
author_id_fullname_str_mv 28a24f55687c82d6f3ee378ead3cf234_***_Graham Shore
author Graham Shore
author2 Graham Shore
format Journal article
container_title Nucl. Phys. B
container_volume 633
container_issue 1-2
container_start_page 271
publishDate 2002
institution Swansea University
doi_str_mv 10.1016/S0550-3213(02)00240-7
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://arxiv.org/abs/gr-qc/0203034
document_store_str 0
active_str 0
description Vacuum polarisation in QED in a background gravitational field induces interactions which effectively violate the strong equivalence principle and affect the propagation of light. In the low frequency limit, Drummond and Hathrell have shown that this mechanism leads to superluminal photon velocities. To confront this phenomenon with causality, however, it is necessary to extend the calculation of the phase velocity vph(ω) to high frequencies, since it is vph(∞) which determines the characteristics of the effective wave equation and thus the causal structure. In this paper, we use a recently constructed expression, valid to all orders in a derivative expansion, for the effective action of QED in curved spacetime to determine the frequency dependence of the phase velocity and investigate whether superluminal velocities indeed persist in the high frequency limit.
published_date 2002-06-24T03:20:13Z
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score 11.013148

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