Validity of the semi-classical approximation in gravity

por Carmen Molina-Paris (University of Leeds)

lunes 18 dic. 2006 12:00 → 13:00 Europe/Madrid

Sala Seminarios (Dpto. de Física Teórica (UVEG))

Far enough from the Planck scale and within the context of a quantum field theory in a curved spacetime (semi-classical approximation), are quantum effects (vacuum polarisation and particle production) so important as to justify the need for a back-reaction calculation? What can we say about the validity of the semi-classical approximation in the framework of a semi-classical formalism?