Abstract
We assume the spacetime foam picture in which vacuum is filled with virtual wormholes. In the presence of an external field the distribution of wormholes changes. We consider an anisotropic distribution of wormholes and analyze its relation to the speed of light. We show that speed of light acquires an anisotropic character and save the normal dispersion a gas of virtual wormholes may possess also an anomalous dispersion, i.e., when the light velocity exceeds that in the vacuum.
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Notes
The additional parameter (rotation matrix \(\Lambda \)) is important only for multipoles of higher orders.
Such a function admits a rigorous definition and we consider it in a separate paper.
I am obligated to V.A. Berezin for pointing out to this fact.
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Acknowledgments
I acknowledge V. A. Berezin and A. A. Kirillov for useful comments and discussions. I am also grateful to the referees for constructive suggestions which essentially improved the paper.
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Savelova, E.P. On possible origin of an anisotropy in the speed of light in vacuum. Gen Relativ Gravit 48, 85 (2016). https://doi.org/10.1007/s10714-016-2079-5
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DOI: https://doi.org/10.1007/s10714-016-2079-5