I.F.T.
Almuerzo-Seminario
(Lunch seminar)
January 26th 1999, 14:00 p.m.
Stochastic Semiclassical Gravity
Enric Verdager
U. Barcelona
A Langevin type of equation is proposed as a
consistent dynamical equation for a perturbative correction to
semiclassical gravity. The equation accounts for the lowest order
quantum fluctuations of the stress-energy tensor of matter fields. A
semiclassical cosmological model with a cosmological constant is
considered in which the back- reaction of the matter fields is able to
drive the cosmological scale factor over the classical barrier into a
de Sitter phase. This model is compared with the "tunneling from
nothing" model in quantum cosmology.
The almuerzo-seminario is
intended to be an informal seminar and an open forum for discussion.
You are wellcome to bring your own
bocata (sandwich), or coffee or tea.
Where: Modulo C-XVI, 3rd floor,
Facultad de Ciencias U.A.M., C.U. Cantoblanco, 28049-Madrid
To get more information about this seminar e-mail
Tomás Ortín
or phone +34-91-397-8546
Last modified: Mon Oct 19 13:51:45 WET DST 1998