Journal article 1201 views
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...
Published in: | Nucl. Phys. B |
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2002
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Online Access: |
http://arxiv.org/abs/gr-qc/0203034 |
URI: | https://cronfa.swan.ac.uk/Record/cronfa17510 |
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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 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 COLLEGE CODE 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 |
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28a24f55687c82d6f3ee378ead3cf234 |
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28a24f55687c82d6f3ee378ead3cf234_***_Graham Shore |
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Graham Shore |
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Graham Shore |
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Nucl. Phys. B |
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633 |
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1-2 |
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271 |
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2002 |
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Swansea University |
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10.1016/S0550-3213(02)00240-7 |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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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 |
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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 |
2002-06-24T06:36:12Z |
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1821476937050095616 |
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11.048216 |