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6 papers · 2 filters
Effective actions, relative cohomology and Chern Simons forms
J. A. de Azcarraga, A. J. Macfarlane, J. C. Perez Bueno
The explicit expression of all the WZW effective actions for a simple group G broken down to a subgroup H is established in a simple and direct way, and the formal similarity of th…
Generalized Conformal Symmetry and Extended Objects from the Free Particle
M. Calixto, V. Aldaya, J. Guerrero
The algebra of linear and quadratic functions of basic observables on the phase space of either the free particle or the harmonic oscillator possesses a finite-dimensional anomaly.…
One-Loop Effective Action for Spherical Scalar Field Collapse
A. Mikovic, V. Radovanovic
We calculate the complete one-loop effective action for a spherical scalar field collapse in the large radius approximation. This action gives the complete trace anomaly, which bes…
Canonical Equivalence of a Generic 2D Dilaton Gravity Model and a Bosonic String Theory
J. Cruz, J. Navarro-Salas
We show that a canonical tranformation converts, up to a boundary term, a generic 2d dilaton gravity model into a bosonic string theory with a Minkowskian target space.
Free fields via canonical transformations of matter-coupled 2D dilaton gravity models
J. Cruz, J. M. Izquierdo, D. J. Navarro +1
It is shown that the 1+1-dimensional matter-coupled Jackiw-Teitelboim model and the model with an exponential potential can be converted by means of appropriate canonical transform…
One-loop Effective Action for a Generic 2D Dilaton Gravity Theory
A. Mikovic, V. Radovanovic
We study the one-loop effective action for a generic two-dimensional dilaton gravity theory conformally coupled to matter fields. We obtain an explicit expression for the effec…