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arXiv · 0809.4870

Holographic model of superfluidity

C. P. Herzog·P. K. Kovtun·D. T. Son
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Abstract

We study a holographic model of a relativistic quantum system with a global U(1) symmetry, at non-zero temperature and density. When the temperature falls below a critical value, we find a second-order superfluid phase transition with mean-field critical exponents. In the symmetry-broken phase, we determine the speed of second sound as a function of temperature. As the velocity of the superfluid component relative to the normal component increases, the superfluid transition goes through a tricritical point and becomes first-order.

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C. P. Herzog, P. K. Kovtun, D. T. Son. 2009-06-07. Holographic model of superfluidity. https://doi.org/10.1103/physrevd.79.066002

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