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Correlation lengths in strongly coupled plasmas from holography

Hoyos, C (Swansea)
Thursday 23 August 2007, 14:20-14:40

Seminar Room 1, Newton Institute


At high temperature, finite correlation lengths appear due to the stochastic nature of thermal fluctuations. Then, small time-dependent perturbations localized in the plasma will not affect regions beyond that length. This can be shown as an exponential decay of the two point correlator with the distance. In N=4 we can study the plasma phase using the holographic gravity dual, a black hole in AdS_5. We identify correlation lengths of different operators with the imaginary part of complex momentum modes of the dual fields in the black hole geometry, and explore their dependence with frequency.


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