Exact results for spin dynamics and fractionalization in the kitaev model

Baskaran, G. ; Mandal, Saptarshi ; Shankar, R. (2007) Exact results for spin dynamics and fractionalization in the kitaev model Physical Review Letters, 98 (24). 247201_1-247201_4. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v98/i24/e247201

Related URL: http://dx.doi.org/10.1103/PhysRevLett.98.247201


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-flip quanta, into two infinitely massive π fluxes and a dynamical majorana fermion, is shown to occur. As the Kitaev Model exemplifies topological quantum computation, our result presents new insights into qubit dynamics and generation of topological excitations.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
Keywords:Quantized Spin Models; Quantum Computation; Fermions in Reduced Dimensions
ID Code:1903
Deposited On:08 Oct 2010 11:38
Last Modified:16 May 2016 12:57

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