Journal
PHYSICAL REVIEW D
Volume 80, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.80.126003
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Recently, a class of gravitational backgrounds in 3+1 dimensions have been proposed as holographic duals to a Lifshitz theory describing critical phenomena in 2+1 dimensions with critical exponent z >= 1. We numerically explore black holes in these backgrounds for a range of values of z. We find drastically different behavior for z > 2 and z < 2. We find that for z > 2 (z < 2) the Lifshitz fixed point is repulsive (attractive) when going to larger radial parameter r. For the repulsive z > 2 backgrounds, we find a continuous family of black holes satisfying a finite energy condition. However, for z < 2 we find that the finite energy condition is more restrictive, and we expect only a discrete set of black hole solutions, unless some unexpected cancellations occur. For all black holes, we plot temperature T as a function of horizon radius r(0). For z boolean AND 1.761 we find that this curve develops a negative slope for certain values of r(0) possibly indicating a thermodynamic instability.
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