Phys. Rev. D 79, 066002 (2009) [11 pages]Holographic model of superfluidityReceived 30 December 2008; published 4 March 2009 We study a holographic model of a relativistic quantum system with a global U(1) symmetry, at nonzero 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.79.066002
DOI:
10.1103/PhysRevD.79.066002
PACS:
11.25.Tq, 04.70.Bw, 74.20.−z
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