por
Alessandro Fabbri
(Dipartimento di Fisica dell'Universita di Bologna and INFN sezione di Bologna, I)
→
Europe/Madrid
Sala Seminarios (Dpto. de Física Teórica (UVEG))
Sala Seminarios
Dpto. de Física Teórica (UVEG)
Descripción
A four dimensional massless and minimally coupled scalar field acquires, after dimensional reduction under spherical symmetry a nontrivial coupling with the dilaton field. Within this theory and in the background Schwarzschild spacetime, we compare the results for the stress tensor coming from canonical quantization with those derived using the effective action method.