Exact results for spin dynamics and fractionalization in the Kitaev Model.

  title={Exact results for spin dynamics and fractionalization in the Kitaev Model.},
  author={Ganapathy Baskaran and Saptarshi Mandal and Ramamurti Shankar},
  journal={Physical review letters},
  volume={98 24},
We present certain exact analytical results for dynamical spin correlation functions in the Kitaev Model. It is the first result of its kind in nontrivial quantum spin models. The result is also novel: in spite of the presence of gapless propagating Majorana fermion excitations, dynamical two spin correlation functions are identically zero beyond nearest neighbor separation. This shows existence of a gapless but short range spin liquid. An unusual, all energy scale fractionalization of a spin… Expand
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