Higher-derivative operators and DeWitt's WKB ansatz

Details Higher-derivative operators and DeWitt's WKB ansatz Higher-derivative operators and DeWitt's WKB ansatz

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..33.1012l&link_type=abstract

Physical Review D (Particles and Fields), Volume 33, Issue 4, 15 February 1986, pp.1012-1017

Physics

9

Asymptotic Problems And Properties

Scientific paper

We investigate the short-distance behaviors of the higher-derivative operators appearing in some field theories which attracted much interest recently, for instance, higher-derivative quantum gravity. This study is important to find the short-distance structures of the related propagators and the one-loop divergences. We develop an algorithm which can be used to find asymptotic expansions of the heat kernels for higher-derivative operators. Our method is applicable both to flat- and to curved-space-time cases.

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