Thermodynamics and Instabilities of a Strongly Coupled Anisotropic Plasma

Details Thermodynamics and Instabilities of a Strongly Coupled Anisotropic Plasma Thermodynamics and Instabilities of a Strongly Coupled Anisotropic Plasma

2011-06-08

arxiv.org/abs/1106.1637v2

JHEP 1107:054,2011

Physics

High Energy Physics

High Energy Physics - Theory

62 pages, 13 figures; v2: typos fixed, added references

Scientific paper

10.1007/JHEP07(2011)054

We extend our analysis of a IIB supergravity solution dual to a spatially anisotropic finite-temperature N=4 super Yang-Mills plasma. The solution is static, possesses an anisotropic horizon, and is completely regular. The full geometry can be viewed as a renormalization group flow from an AdS geometry in the ultraviolet to a Lifshitz-like geometry in the infrared. The anisotropy can be equivalently understood as resulting from a position-dependent theta-term or from a non-zero number density of dissolved D7-branes. The holographic stress tensor is conserved and anisotropic. The presence of a conformal anomaly plays an important role in the thermodynamics. The phase diagram exhibits homogeneous and inhomogeneous (i.e. mixed) phases. In some regions the homogeneous phase displays instabilities reminiscent of those of weakly coupled plasmas. We comment on similarities with QCD at finite baryon density and with the phenomenon of cavitation.

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