Bound on the Photon Charge from the Phase Coherence of Extragalactic Radiation

Brett Altschul
Phys. Rev. Lett. 98, 261801 – Published 27 June 2007

Abstract

If the photon possessed a nonzero charge, then electromagnetic waves traveling along different paths would acquire Aharonov-Bohm phase differences. The fact that such an effect has not hindered interferometric astronomy places a bound on the photon charge estimated to be at the 1032e level if all photons have the same charge and 1046e if different photons can carry different charges.

  • Received 28 March 2007

DOI:https://doi.org/10.1103/PhysRevLett.98.261801

©2007 American Physical Society

Authors & Affiliations

Brett Altschul*

  • Department of Physics, Indiana University, Bloomington, Indiana 47405 USA

  • *baltschu@indiana.edu

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Issue

Vol. 98, Iss. 26 — 29 June 2007

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