Amanda W. Peet

Lifshitz-like black brane thermodynamics in higher dimensions

Gravitational backgrounds in d+2 dimensions have been proposed as holographic duals to Lifshitz-like theories describing critical phenomena in d + 1 dimensions with critical exponent z 1. We numerically explore a dilatonEinstein-Maxwell model admitting such backgrounds as solutions. Such backgrounds are characterized by a temperature T and chemical potential , and we nd how to embed these solutions into AdS for a range of values of z and d. We nd no thermal instability going from the T to the T regimes, regardless of the dimension, and nd that the solutions smoothly interpolate

Entropy and action of dilaton black holes

We present a detailed calculation of the entropy and action of U(l) dilaton black holes and show that both quantities coincide with one quarter of the area of the event horizon. Our methods of calculation make it possible to find an explanation of the rule S = A/4 for all static, spherically symmetric four-dimensional black holes studied so far. We show that the only contribution to the entropy comes from the extrinsic curvature term at the horizon, which gives S = A/4 independently of the charge(s) of the black hole, presence of scalar fields, etc. Previously, this result did not have a general explanation, but was established on a case-by-case basis. The on-shell Lagrangian for maximally supersymmetric extreme dilaton black holes is also calculated and shown to vanish, in agreement with the result obtained by taking the limit of the expression obtained for black holes with regular horizon. The physical meaning of the entropy is discussed in relation to the issue of

Dilaton black holes near the horizon.

Generic

Operator mixing for string states in the D1-D5 CFT near the orbifold point

{\mathrm{U}(1)}^{2}

String thermalization at a black hole horizon

four-dimensional (4D) black holes with unbroken

Twist-nontwist correlators in

N=1

M^N/S_N

supersymmetry are shown to tend to a Robinson-Bertotti-type geometry with a linear dilaton and doubling of unbroken super-symmetries near the horizon. Purely magnetic dilatonic black holes, which have unbroken

orbifold CFTs

N=2

Analyzing the squeezed state generated by a twist deformation

supersymmetry, behave near the horizon as a 2D linear dilaton vacuum

Perturbatively charged holographic disorder

\ensuremath{\bigotimes}{S}^{2}