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Sound modes in holographic superfluids
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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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Cited by 1 Pith paper
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Near extremal RN-AdS control of holographic Josephson transport
Proposes a holographic SNS junction in Einstein-Maxwell-charged-scalar AdS4 theory where the near-extremal RN-AdS throat supplies an infrared scaling mechanism for the Josephson critical current and phase stiffness af...
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