GAUGE-AVERAGING FUNCTIONALS FOR EUCLIDEAN MAXWELL THEORY IN THE PRESENCE OF BOUNDARIES

被引:18
作者
ESPOSITO, G [1 ]
机构
[1] UNIV SALERNO,DIPARTIMENTO FIS TEOR,I-84081 BARONISSI,ITALY
关键词
D O I
10.1088/0264-9381/11/4/010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
This paper studies the one-loop expansion of the amplitudes of electromagnetism about flat Euclidean backgrounds bounded by a 3-sphere, recently considered in perturbative quantum cosmology, by using zeta-function regularization. For a specific choice of gauge-averaging functional, the contributions to the full zeta(0) value owed to physical degrees of freedom, decoupled gauge mode, coupled gauge modes, and Faddeev-Popov ghost field are derived in detail, and alternative choices for such a functional are also studied. This analysis enables one to get a better understanding of different quantization techniques for gauge fields and gravitation in the presence of boundaries.
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页码:905 / 926
页数:22
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