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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: Kerr-CFT and gravitational perturbations

Presented by Oscar Dias, DAMTP Cambridge

2 December 2009 13:00 in CM221

The Kerr-CFT correspondence proposes a microscopic computation of the
Hawking-Bekenstein temperature of an extreme Kerr black hole. This
computation relies heavily on considerations on the asymptotic
symmetry group of the solution, ie on boundary conditions. But
boundary conditions are also required to have a well-posed initial
value problem in classical general relativity. We are thus motivated
to investigate perturbations of the near-horizon extreme Kerr
spacetime relevant for the correspondence. The Teukolsky equation for
a massless field of arbitrary spin is solved. Solutions fall into two
classes: normal modes and traveling waves. We study the stability of
the solution. The explicit form of metric perturbations is obtained
using the Hertz potential formalism, and compared with the Kerr-CFT
boundary conditions. We then discuss the consequences of our boundary
conditions for the Kerr/CFT correspondence.

note unusual day of the week

Contact daniele.dorigoni@durham.ac.uk or jyotirmoy.bhattacharya@durham.ac.uk for more information