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Deformations of Extremal Black Holes and the UV
Calvin Y. -R. Chen, Claudia de Rham, Andrew J. Tolley
It has recently been noted that deformations of extremal AdS black holes in four and higher dimensions are generically non-smooth or singular on the horizon. Further, it was found…
Scalar Radiation with a Quartic Galileon
Claudia de Rham, John T. Giblin, Andrew J. Tolley
The class of Galileon scalar fields theories encapsulate the Vainshtein screening mechanism which is characteristic of a large range of infrared modified theories of gravity. Such…
Decoherence out of fire: Purity loss in expanding and contracting universes
Thomas Colas, Claudia de Rham, Greg Kaplanek
We investigate quantum decoherence in a class of models which interpolates between expanding (inflation) and contracting (ekpyrosis) scenarios. For the cases which result in a scal…