Gravity Duals of Lifshitz-like Fixed Points

Details Gravity Duals of Lifshitz-like Fixed Points Gravity Duals of Lifshitz-like Fixed Points

2008-08-13

arxiv.org/abs/0808.1725v2

Phys.Rev.D78:106005,2008

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, harvmac; v2 comments about behavior of metric near r=0 added (thanks to S. Hartnoll and G. Horowitz)

Scientific paper

10.1103/PhysRevD.78.106005

We find candidate macroscopic gravity duals for scale-invariant but non-Lorentz invariant fixed points, which do not have particle number as a conserved quantity. We compute two-point correlation functions which exhibit novel behavior relative to their AdS counterparts, and find holographic renormalization group flows to conformal field theories. Our theories are characterized by a dynamical critical exponent $z$, which governs the anisotropy between spatial and temporal scaling $t \to \lambda^z t$, $x \to \lambda x$; we focus on the case with $z=2$. Such theories describe multicritical points in certain magnetic materials and liquid crystals, and have been shown to arise at quantum critical points in toy models of the cuprate superconductors. This work can be considered a small step towards making useful dual descriptions of such critical points.

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