Density matrix of a finite sub-chain of the Heisenberg anti-ferromagnet

Jun, 2005
6 pages
Published in:
  • Lett.Math.Phys. 75 (2006) 201-208
e-Print:

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Abstract:
We consider a finite sub-chain on an interval of the infinite XXX model in the ground state. The density matrix for such a subsystem was described in our previous works for the model with inhomogeneous spectral parameters. In the present paper, we give a compact formula for the physically interesting case of the homogeneous model.
  • XXX model
  • correlation function
  • qKZ equation
  • density matrix