Article ID Journal Published Year Pages File Type
1894575 Journal of Geometry and Physics 2007 25 Pages PDF
Abstract

Regularised traces on classical pseudodifferential operators are extended to tensor products of classical pseudodifferential operators via a (second) quantisation procedure  . Whereas ordinary ζζ-regularised traces are not generally expected to be local, using techniques borrowed from Connes and Moscovici [A. Connes, H. Moscovici, The local index formula in noncommutative geometry, Geom. Funct. Anal. 5 (2) (1995) 174–243], Higson [N. Higson, The residue index theorem of Connes and Moscovici, in: Clay Mathematics Proceedings, 2004, http://www.math.psu.edu/higson/ResearchPapers.html], we show that if QQ has scalar leading symbol, higher quantised  ζζ-regularised traces   are local since they can be expressed as a finite linear combination of noncommutative residues. Just as ordinary ζζ-regularised traces, they present anomalies (Hochschild coboundary, dependence on the weight QQ), which for quantised ζζ-regularised traces of level nn, are roughly speaking finite linear combinations of quantised regularised traces of level n+1n+1. As a result, anomalies are local for any non negative nn, which yields back as a particular case the fact that ordinary ζζ-regularised traces present local anomalies.1

Related Topics
Physical Sciences and Engineering Mathematics Mathematical Physics
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