6533b7d4fe1ef96bd1262068
RESEARCH PRODUCT
Generalized Virasoro anomaly and stress tensor for dilaton coupled theories
José Navarro-salasS. FareseAlessandro Fabbrisubject
Tensor contractionPhysicsAstrofísicaHigh Energy Physics - TheoryNuclear and High Energy PhysicsCauchy stress tensorDilaton coupled theoriesHawking radiationFOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)General Relativity and Quantum CosmologyHigh Energy Physics::TheoryGeneral Relativity and Quantum CosmologyClassical mechanicsHigh Energy Physics - Theory (hep-th)Stress tensorDilatonCovariant transformationVacuum polarizationVacuum polarizationAnomaly (physics)Tensor densityScalar fieldVirasoro and trace anomaliesMathematical physicsdescription
We derive the anomalous transformation law of the quantum stress tensor for a 2D massless scalar field coupled to an external dilaton. This provides a generalization of the Virasoro anomaly which turns out to be consistent with the trace anomaly. We apply it together with the equivalence principle to compute the expectation values of the covariant quantum stress tensor on a curved background. Finally we briefly illustrate how to evaluate vacuum polarization and Hawking radiation effects from these results.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-09-16 |