Monday, April 22, 2013

1304.5512 (Andreas Klümper et al.)

Correlation functions of the integrable isotropic spin-1 chain:
algebraic expressions for arbitrary temperature

Andreas Klümper, Dominic Nawrath, Junji Suzuki
We derive algebraic formulas for the density matrices of finite segments of the integrable su(2) isotropic spin-1 chain in the thermodynamic limit. We give explicit results for the 2 and 3 site cases for arbitrary temperature T and zero field. In the zero temperature limit the correlation functions are given in elementary form in terms of Riemann's zeta function at even integer arguments.
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