Lifshitz quasinormal modes and relaxation from holography

Understand

We obtain relaxation times for field theories with Lifshitz scaling and with holographic duals Einstein-Maxwell-Dilaton gravity theories.

• This is done by computing quasinormal modes of a bulk scalar field in the presence of Lifshitz black branes.
• We determine the relation between relaxation time and dynamical exponent z, for various values of boundary dimension d and operator scaling dimension.
• It is found that for d>z+1, at zero momenta, the modes are non-overdamped, whereas for d<=z+1 the system is always overdamped.