Sound modes in holographic superfluids

Details Sound modes in holographic superfluids Sound modes in holographic superfluids

2009-06-26

arxiv.org/abs/0906.4810v1

Physics

High Energy Physics

High Energy Physics - Theory

22 pages, 7 figures

Scientific paper

Superfluids support many different types of sound waves. We investigate the relation between the sound waves in a relativistic and a non-relativistic superfluid by using hydrodynamics to calculate the various sound speeds. Then, using a particular holographic scalar gravity realization of a strongly interacting superfluid, we compute first, second and fourth sound speeds as a function of the temperature. The relativistic low temperature results for second sound differ from Landau's well known prediction for the non-relativistic, incompressible case.

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