Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010gras.conf..140k&link_type=abstract
GRAVITATION AND ASTROPHYSICS. Proceedings of the Ninth Asia-Pacific International Conference. Held 29 June-2 July 2009 in Wuhan,
Astronomy and Astrophysics
Astrophysics
Scientific paper
We discuss a covariant decomposition of gauge fields into gauge-invariant physical components and gauge-dependent unphysical components. In particular, we consider QED with nonlinear gauge conditions and Yang-Mills gravity with 4-dimensional translational gauge symmetry (T(4) group) in flat space-time. The consistency and intimate relations among decomposition of gauge fields for all times, and gauge conditions and Faddeev-Popov ghost fields are investigated. The gauge invariance of QED and Yang-Mills gravity are revealed by the invariance of physical components under gauge transformations.
Chen Xiang-Song
Hsu Jong-Ping
Katz Daniel C.
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