Energy-gap analysis of quantum spin-glass transitions at zero temperature

  • Kazutaka Takahashi, Yoshiki Matsuda
  • Published 2010

Abstract

We study for random quantum spin systems the energy gap between the ground and first excited states to clarify a relation to the spin-glass–paramagnetic phase transition. We find that for the transverse Sherrington-Kirkpatrick model the vanishing of the averaged gap does not identify the transition. A power-law form of the gap distribution function leads to… (More)

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Cite this paper

@inproceedings{Takahashi2010EnergygapAO, title={Energy-gap analysis of quantum spin-glass transitions at zero temperature}, author={Kazutaka Takahashi and Yoshiki Matsuda}, year={2010} }