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

H. Boos , M. Jimbo , T. Miwa , F. Smirnov (1) , Y. Takeyama

1 LPTHE - Laboratoire de Physique Théorique et Hautes Energies

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.

Domaines: Autre [cond-mat.other]; Physique des Hautes Energies - Théorie [hep-th]

H. Boos, M. Jimbo, T. Miwa, F. Smirnov, Y. Takeyama. Density matrix of a finite sub-chain of the Heisenberg anti-ferromagnet. Letters in Mathematical Physics, 2006, 75, pp.201-208. ⟨hal-00101477⟩