[Todos] ANUNCIO PRÓXIMO SEMINARIO DEL IFLP/DTO FÍSICA

Jue Dic 5 14:55:17 ART 2013

Les agradezco la difusión del anuncio del próximo seminario del *ciclo de
Coloquios y Seminarios que se organizan en el **Instituto de Física La
Plata*/ *Departamento de Física*

*SEMINARIO  DEL IFLP y DEL DEPARTAMENTO*

*Martes 10 de diciembre 11:00hs – AULA CHICA*

*TÍTULO:* *"**POSSIBLE QUANTUM GRAVITY EFFECTS IN GENERAL RELATIVITY**"*

*EXPOSITOR**: Subir Ghosh*

*Physics and Applied Mathematics Unit,*

*Indian Statistical Institute, Kolkata, India.*

*RESUMEN*: In this talk two perspectives of Quantum Gravity induced
modifications of General Relativity (GR) will be discussed: Generalized
Uncertainty Principle  framework and Horava Gravity  framework. Both
frameworks depend crucially on Dirac’s formulation of Hamiltonian
constraint dynamics.

Generalized Uncertainty Principle framework:  Compatibility with GUP
requires a generalization of the relativistic point particle model. In an
external curved background this will lead to deviations from the geodesic
motion leading to possible violations of Equivalence Principle.

Horava Gravity framework:  Higher spatial derivative terms are introduced
in GR to improve the short distance behaviour of the graviton propagator.
This extension, expected to be important at short distance (or high energy),
 explicitly breaks Lorentz invariance. We discuss some aspects of this in a
toy model.

Signatures of Quantum Gravity effects are expectedly very small to be
observed in present day experiments.

 La entrada es libre y gratuita.

* Lugar: Aula Chica del Departamento de Física de la Facultad de Ciencias
Exactas; calle 49 y 115*
*Contacto: manias en fisica.unlp.edu.ar <manias en fisica.unlp.edu.ar> *

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