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arXiv · 1511.05112

Order parameter fluctuations in the holographic superconductor

N. W. M. Plantz·H. T. C. Stoof·S. Vandoren
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Abstract

We investigate the effect of order parameter fluctuations in the holographic superconductor. In particular, using a fully backreacted bulk geometry, the intrinsic spectral functions of the order parameter in both the normal and the superconducting phase are computed. We also present a vector-like large-$N$ version of the Ginzburg-Landau model that accurately describes our long-wavelength results in both phases. The large-$N$ limit of the latter model explains why the Higgs mode and the second-sound mode are not present in the spectral functions. Our results indicate that the holographic superconductor describes a relativistic multi-component superfluid in the universal regime of the BEC-BCS crossover.

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N. W. M. Plantz, H. T. C. Stoof, S. Vandoren. 2017-01-16. Order parameter fluctuations in the holographic superconductor. https://doi.org/10.1088/1361-6455%2Faa584c

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