Lecturer: Dr. Shahar Hadar
Affiliation: Center for Theoretical Cosmology
(CTC), University of Cambridge
Abstract:
The linear axion model, proposed
by Andrade and Withers, is the
simplest extant holographic model
of transport with momentum
relaxation in a strongly coupled
field theory without quasiparticles.
On the gravity side it is an
asymptotically Anti-de Sitter black
brane solution of General
Relativity with additional matter
fields which have a nonzero
profile at equilibrium. We develop
a gauge-invariant formalism for
studying the perturbations of this
solution and compute its
quasinormal modes. We find
strong evidence for the model's
stability and find an intriguing
critical-damping behavior for a
certain family of modes. For a
special value of the parameters
the symmetry is enhanced,
allowing an analytical computation
of the full quasinormal spectrum.
Additional details of the upcoming
High Energys' seminars
can be found on the following link.