Year: 1995
Type: article
Abstract: The actions of the `R=T' and string-inspired theories of gravity in (1+1) dimensions are generalized into one single action which is characterized by two functions. We discuss differing interpretations of the matter stress--energy tensor, and show how two such different interpretations can yield two different sets of field equations from this action. The weak-field approximation, post-Newtonian expansion, hydrostatic equilibrium state of a star and two-dimensional cosmology are studied separately by using the two sets of field equations. Some properties in the `R=T' and string-inspired theories are shown to be generic in the theory induced by the generalized action.
Source: Classical and Quantum Gravity
Authors: J S F Chan, R B Mann
Institution: University of Waterloo
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2132163639