Density matrix of a finite sub-chain of the Heisenberg anti-ferromagnet
Jun, 2005
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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
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