Please use this identifier to cite or link to this item:
Title: Comment on `Modified photon equation of motion as a test for the principle of equivalence'
Authors: Nityananda, R.
Issue Date: 15-Jul-1992
Publisher: The American Physical Society
Citation: Physical Review D, 1992, Vol.46, 871-872
Abstract: In a recent paper, a modification of the geodesic equation was proposed for spinning photons containing a spin-curvature coupling term. The difference in arrival times of opposite circular polarizations starting simultaneously from a source was computed, obtaining a result linear in the coupling parameter. It is pointed out here that this linear term violates causality and, more generally, Fermat's principle, implying calculational errors. Even if these are corrected, there is a violation of covariance in the way the photon spin was introduced. Rectifying this makes the effect computed vanish entirely.
ISSN: 1550-7998 (print)
Alternative Location:
Copyright: (1992) by the American Physical Society
Appears in Collections:Research Papers (TP)

Files in This Item:
File Description SizeFormat 
1992 PhyRevD V46 p871.pdf2p.236.56 kBAdobe PDFView/Open

Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.