Vacuum thin shells in EGB brane-world cosmology

MARCOS A. RAMIREZ

New York City

Conferencia; 21st International Conference on General Relativity and Gravitation; 2016

Columbia University

In this talk we construct new solutions of the EGB field equations in a SMS braneworldsetting which represent a couple of Z2 -symmetric vacuum thin shells splittingfrom the central brane, and explore the main properties of the dynamics of the system.The matching of the separating vacuum shells with the brane-world is assmooth as possible and all matter fields are restricted to the brane. Several implicationsfor the effective Friedmann equations on the brane are discussed, andcompared with standard cosmology. We also comment on the relation of this systemwith the thermodynamic instability of highly symmetric vacuum solutions ofLovelock theory