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Durham University

Research & business

Research lectures, seminars and events

The events listed in this area are research seminars, workshops and lectures hosted by Durham University departments and research institutes. If you are not a member of the University, but  wish to enquire about attending one of the events please contact the organiser or host department.


 

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Events for 25 November 2019

Milton Jara: Entropy methods in Markov chain mixing.

1:00pm, CM107

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 ellen.g.powell@durham.ac.uk for more information about this event.


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

5:00pm, OC218

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 Daniel Martin for more information about this event.