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Centre for Mathematical Physics and Stochastics
Department of Mathematical Sciences, University of Aarhus

Funded by The Danish National Research Foundation

MPS-RR 1999-31
September 1999

Abelian gauge fields coupled to simplicial quantum gravity


Jan Ambjørn

K. N. Anagnostopoulos, J. Jurkiewicz


We study the coupling of Abelian gauge theories to four-dimensional simplicial quantum gravity. The gauge fields live on dual links. This is the correct formulation if we want to compare the effect of gauge fields on geometry with similar effects studied so far for scalar fields. It shows that gauge fields couple equally weakly to geometry as scalar fields, and it offers an understanding of the relation between measure factors and Abelian gauge fields observed so-far.

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This paper has now been published in J. High Energy Phys. 9908 (1999) 016