Quantisation of 2D-gravity with Weyl and area-preserving diffeomorphism invariances

  • The constraint structure of the induced 2D-gravity with the Weyl and area-preserving diffeomorphism invariances is analysed in the ADM formulation. It is found that when the area-preserving diffeomorphism constraints are kept, the usual conformal gauge does not exist, whereas there is the possibility to choose the so-called "quasi-light-cone" gauge, in which besides the area-preserving diffeomorphism invariance, the reduced Lagrangian also possesses the SL(2,R) residual symmetry. This observation indicates that the claimed correspondence between the SL(2,R) residual symmetry and the area-preserving diffeomorphism invariance in both regularisation approaches does not hold. The string-like approach is then applied to quantise this model, but a fictitious non-zero central charge in the Virasoro algebra appears. When a set of gauge-independent SL(2,R) current-like fields is introduced instead of the string-like variables, a consistent quantum theory is obtained, which means that the area-preserving diffeomorphism invariance can be maintained at the quantum level.

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Verfasserangaben:J.-Q. Liang, H. J. W. Müller-Kirsten, Zhenjiu Zhang, J.-G. Zhou, Y.-G. Miao
URN (Permalink):urn:nbn:de:hbz:386-kluedo-8531
Sprache der Veröffentlichung:Englisch
Jahr der Fertigstellung:1996
Jahr der Veröffentlichung:1996
Veröffentlichende Institution:Technische Universität Kaiserslautern
Datum der Publikation (Server):03.04.2000
Fachbereiche / Organisatorische Einheiten:Fachbereich Physik
DDC-Sachgruppen:5 Naturwissenschaften und Mathematik / 530 Physik
Lizenz (Deutsch):Standard gemäß KLUEDO-Leitlinien vor dem 27.05.2011

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