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El ciclo de seminarios De Madrid al Cosmos busca la difusión de la investigación en cosmología teórica y temas relacionados. Los seminarios del ciclo pretenden ser accesibles a un público no especializado, pero con conocimientos de física fundamental.

El ciclo está organizado conjuntamente por el Grupo de Teorías Efectivas en Física Moderna de la Universidad Complutense de Madrid y el Grupo de Gravitación y Cosmología del Instituto de Estructura de la Materia (IEM-CSIC).

Fotografías de la Facultad de Ciencias Físicas de la UCM y del CFMAC

Facultad de Ciencias Físicas de la UCM y Centro de Física Miguel Antonio Catalán (CSIC)

Próximo seminario

Inflation and initial conditions: the role of fluctuation-dissipation dynamics

Ponente: Mar Bastero Gil
Filiación: Universidad de Granada
Resumen: In this talk we review the problem of initial conditions for slow-roll inflation along a plateau-like scalar potential within the framework of fluctuation-dissipation dynamics. We consider, in particular, that inflation was preceded by a radiation-dominated epoch where the inflaton is coupled to light degrees of freedom and may reach a near-equilibrium state. We show that the homogeneous field component can be sufficiently localized at the origin to trigger a period of slow-roll if the interactions between the inflaton and the thermal degrees of freedom are sufficiently strong and argue that this does not necessarily spoil the flatness of the potential at the quantum level. This may lead to a later perior of thermal inflation, which suppresses the effects of nonlinear interactions. between the homogeneous and inhomogeneous field modes that could prevent the former from entering a slow-roll regime.
Fecha y hora: 17 de mayo de 2018, 15:00 h.
Lugar: CSIC, CFMAC, sala de conferencias (c/ Serrano, 121)

 

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