Geometry and physics of pseudodifferential operators on manifolds

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A review is made of the basic tools used in mathematics to define a calculus for pseudodifferential operators on Riemannian manifolds endowed with a connection: existence theorem for the function that generalizes the phase; analogue of Taylor's theorem; torsion and curvature terms in the symbolic calculus; the two kinds of derivative acting on smooth sections of the cotangent bundle of the Riemannian manifold; the concept of symbol as an equivalence class. Physical motivations and applications are then outlined, with emphasis on Green functions of quantum field theory and Parker's evaluation of Hawking radiation.

Original languageEnglish
Article number159
JournalNuovo Cimento della Societa Italiana di Fisica C
Issue number5
Number of pages14
Publication statusPublished - 1 Sep 2015
Externally publishedYes

ID: 194769539