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Spontaneous Lorentz violation in gauge theories

Balachandran, AP and Vaidya, S (2013) Spontaneous Lorentz violation in gauge theories. In: EUROPEAN PHYSICAL JOURNAL PLUS, 128 (10).

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Official URL: http://dx.doi.org/10.1140/epjp/i2013-13118-9


Frohlich, Morchio and Strocchi long ago proved that the Lorentz invariance is spontaneously broken in QED because of infrared effects. We develop a simple model where the consequences of this breakdown can be explicitly and easily calculated. For this purpose, the superselected U(1) charge group of QED is extended to a superselected ``Sky'' group containing direction-dependent gauge transformations at infinity. It is the analog of the Spi group of gravity. As Lorentz transformations do not commute with Sky, they are spontaneously broken. These Abelian considerations and model are extended to non-Abelian gauge symmetries. Basic issues regarding the observability of twisted non-Abelian gauge symmetries and of the asymptotic ADM symmetries of quantum gravity are raised.

Item Type: Journal Article
Additional Information: copyright for this article belongs to Authors
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Depositing User: Id for Latest eprints
Date Deposited: 13 Nov 2013 10:49
Last Modified: 13 Nov 2013 10:51
URI: http://eprints.iisc.ac.in/id/eprint/47741

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