arXiv subjects

M. Blagojević

Publications and source records attributed to M. Blagojević.

22 records · Page 2Linked to original sources

arXiv1997

Conservation Laws in Poincaré Gauge Theory

Basic features of the conservation laws in the Hamiltonian approach to the Poincaré gauge theory are presented. It is shown that the Hamiltonian is given as a linear combination of ten first class constraints. The Poisson bracket algebra of these constraints is used to construct the gauge generators. By assuming that the asymptotic symmetry is the global Poincaré symmetry, we derived the improved form of the asymptotic generators, and discussed the related conservation laws of energy, momentum, etc.

hep-th↗

arXiv1997

On the Equivalence between 2D Induced Gravity and a WZNW system

A general method of constructing canonical gauge invariant actions is used to establish the equivalence between 2D induced gravity and a WZNW system, defined by a difference of two simple WZNW actions fo the SL(2,R) group. The diffeomorphism invariance of the induced gravity is generated by the SL(2,R) Kac-Moody structure of the WZNW system.

hep-th↗

arXiv1995

BRST Analysis of Gauge Theories Based on Nonlinear Algebras in 2d

Covariant quantization of theories based on nonlinear extensions of Lie algebras in 2d is studied by using a generalized Lagrangian BRST formalism. The quantum action is constructed to be invariant under the off--shell nilpotent BRST transformations by using a set of independent antifields as auxiliary, nonpropagating variables in the quantum theory. The general results are applied to the quantization of nonlinear gauge theory based on quadratic Poincaré algebra, which is closely related to 2d gravity with dynamical torsion.

hep-th↗

arXiv1993

Conformal Gauge Generators in Liouville Theory

The conformal symmetry in the Liouville theory is analysed by using the Hamiltonian light--front formalism. The boundary conditions of dynamical variables are seen to involve an arbitrary function of time, so that the standard methods for studying gauge symmetries do not work. We develop a general method for constructing the gauge generators, which enables a consistent treatment of the boundary conditions present in the case of the conformal symmetry.

hep-th↗