All Title Author
Keywords Abstract

Physics  1993 

Hamiltonian Approach to 2D Dilaton-Gravities and Invariant Adm Mass

DOI: 10.1103/PhysRevD.47.5408

Full-Text   Cite this paper   Add to My Lib


The formula existing in the literature for the ADM mass of 2D dilaton gravity is incomplete. For example, in the case of an infalling matter shockwave this formula fails to give a time-independent mass, unless a very special coordinate system is chosen. We carefully carry out the canonical formulation of 2D dilaton gravity theories (classical, CGHS and RST). As in 4D general relativity one must add a boundary term to the bulk Hamiltonian to obtain a well-defined variational problem. This boundary term coincides with the numerical value of the Hamiltonian and gives the correct mass which obviously is time-independent.


comments powered by Disqus

Contact Us


微信:OALib Journal