Sound modes in holographic superfluids
نویسندگان
چکیده
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. ar X iv :0 90 6. 48 10 v1 [ he pth ] 2 6 Ju n 20 09
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تاریخ انتشار 2009