The quasi-normal modes of quantum criticality

  title={The quasi-normal modes of quantum criticality},
  author={William Witczak-Krempa},
Abstract We study charge transport of quantum critical points described by conformal field theories in 2+1 spacetime dimensions. The transport is described by an e↵ective field theory on an asymptotically antide Sitter spacetime, expanded to fourth order in spatial and temporal gradients. The presence of a horizon at non-zero temperatures implies that this theory has quasi-normal modes with complex frequencies. The quasi-normal modes determine the poles and zeros of the conductivity in the… CONTINUE READING
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