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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP Lunchtime Seminars: Transport in gauge/gravity duality

Presented by Miguel Paulos, DAMTP Cambridge

9 December 2009 13:00 in CM221

I present an efficient method for computing the zero frequency limit
of transport coefficients in strongly coupled field theories described
holographically by higher derivative gravity theories. Hydrodynamic
parameters such as shear viscosity and conductivity can be obtained by
computing residues of poles of the off-shell lagrangian density. I
clarify in which sense these coefficients can be thought of as
effective couplings at the horizon, and present analytic, Wald-like
formulae for the shear viscosity and conductivity in a large class of
general higher derivative lagrangians. I show how to apply our methods
to systems at zero temperature but finite chemical potential.

note unusual day of the week

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