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On path integral localization and the Laplacian
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Theoretical Physics.
1999 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis, we develop path integral localization methods that are familiar from topological field theory: the integral over the infinite dimensional integration domain depends only on local data around some finite dimensional subdomain.

We introduce a new localization principle that unifies BRST localization, the non-Abelian localization principle and the conformal generalization of the Duistermaat-Heckman integration formula..

In addition, it is studied if one can possibly derive a generalized Selberg's trace formula on locally homogeneous manifolds using localization techniques. However, a definite answer is obtained only in the Lie group case (we complete the work of R. Picken) in which it is an application of the Duistermaat-Heckman integration formula. Also a new derivation of DeWitt's term is reported.

Furthermore, connections between evolution operators of integrable models and localization methods are studied. A derivative expansion localization is presented and it is conjectured to apply also to integrable models, for example the Toda lattice.

Moreover, a pedagogical introduction to the localization techniques is given, as well as a list of selected references that might be useful for a beginning graduate student in mathematical physics or for a mathematician who would like to study the physical point of view to topological field theory and string theory.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis , 1999. , 37 p.
Keyword [en]
Theoretical physics
Keyword [sv]
Teoretisk fysik
National Category
Physical Sciences
Research subject
Theoretical Physics
URN: urn:nbn:se:uu:diva-1162ISBN: 99-2947859-0OAI: oai:DiVA.org:uu-1162DiVA: diva2:160713
Public defence
1999-05-17, Room 146, Building 2, Polacksbacken, Uppsala University, Uppsala, 13:15
Available from: 1999-04-26 Created: 1999-04-26Bibliographically approved

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