On the second-neighbor correlator in 1D XXX quantum antiferromagnetic spin chain
نویسنده
چکیده
We have calculated the energy per site for the ground state of antiferromagnetic quantum spin chain with variable range exchange h(j − k) ∝ sinh a sinh a(j − k) in the framework of the asymptotic Bethe ansatz. By expanding it in powers of e, we have confirmed the value of the second-neighbor correlator for the model with nearest-neighbor exchange obtained earlier in the atomic limit of the Hubbard chain. Also member of the Doppler Institute of Mathematical Physics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Prague
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