IAS Fellows' Seminar - Collaboration between institutional actors and women civil society representatives in peace processes: the potential of Regional Women Mediator Networks in engaging with different actors

Contact enquiries.ias@durham.ac.uk for more information about this event.

Milton Jara: Entropy methods in Markov chain mixing.

We develop a new strategy to compute the mixing time of Markov chains, based on the relative entropy method proposed by Yau and further developed by J.-Menezes. We apply this strategy to derive a Gaussian profile cut-off for mean-field Markov chains in infinite temperature.
Joint work with Freddy Hernández (Bogotá)

Contact georgios.karagiannis@durham.ac.uk, konstantinos.perrakis@durham.ac.uk for more information about this event.

Gabriel Arenas-Henriquez: Lovelock-AdS gravity: vacuum degeneracy and conserved charges

In this talk we will derive an expression for conserved charges in Lovelock anti–de Sitter gravity for solutions having k-fold degenerate vacua, making manifest a link between the degeneracy of a given vacuum and the nonlinearity of the energy formula. The level of degeneracy fixes the relevant order in the curvature where the mass of a black hole solution is contained. As a matter of fact, the full charge can be consistently truncated and expressed in terms of powers of the Weyl tensor. This may be interpreted as a natural generalization of the Ashtekar-Magnon-Das formula for any Lovelock-AdS gravity theories.

Contact sagharsadat.hosseinisemnani@durham.ac.uk, gabriel.arenas-henriquez@durham.ac.uk for more information about this event.