# Ground state and low excitations of an integrable chain with alternating spins

@article{Meissner1996GroundSA, title={Ground state and low excitations of an integrable chain with alternating spins}, author={S. Meissner and B.-D. Doerfel}, journal={Journal of Physics A}, year={1996}, volume={29}, pages={1949-1960} }

An anisotropic integrable spin chain, consisting of spins s = 1 and , is investigated [1]. It is characterized by two real parameters and , the coupling constants of the spin interactions. For the case and the ground-state configuration is obtained by means of thermodynamic Bethe ansatz. Furthermore, the low excitations are calculated. It turns out that apart from free magnon states being the holes in the ground-state rapidity distribution, there exist bound states given by special string…

## 12 Citations

Ground-state structure and low temperature behaviour of an integrable chain with alternating spins

- Physics
- 1996

In this paper we continue the investigation of an anisotropic integrable spin chain, consisting of spins s = 1 and , started in our paper (Meis ner St and Dorfel B-D 1996 J. Phys. A: Math. Gen. 29…

Complete phase diagram for the integrable chain with alternating spins in the sectors with competing interactions

- Physics
- 1998

We investigate the anisotropic integrable spin chain consisting of spins and s = 1 by means of thermodynamic Bethe ansatz for the anisotropy , where the analysis of the Takahashi conditions leads to…

Exact spinon excitations in an integrable ferrimagnetic spin chain

- Physics
- 2009

An exactly solvable one-dimensional ferrimagnetic quantum spin chain model with alternating 1/2-spins and 1-spins is proposed and solved via algebraic Bethe ansatz. It is found that the ground state…

Thermodynamics and conformal properties of XXZ chains with alternating spins

- Physics, Mathematics
- 2004

The quantum periodic XXZ chain with alternating spins is studied. The properties of the related R-matrix and Hamiltonians are discussed. A compact expression for the ground-state energy is obtained.…

Dispersion relations and speeds of sound in special sectors for the integrable chain with alternating spins

- Physics
- 1999

We investigate the anisotropic integrable chain consisting of spins and s = 1. Depending on the anisotropy and the ratio of the coupling constants it has different (antiferromagnetic) ground states,…

Finite-size corrections of an integrable chain with alternating spins

- Physics
- 1997

In this paper we calculate the finite-size corrections of an anisotropic integrable spin chain, consisting of spins s = 1 and . The calculations are done in two regions of the phase diagram with…

Integrable ladder t-J model with staggered shift of the spectral parameter

- Mathematics, Physics
- 2001

The generalization of the Yang-Baxter equations in the presence of 2 grading along both chain and time directions is presented and an integrable model of t-J type with staggered disposition of shifts…

Existence of a magnetization plateau in a class of exactly solvable Ising–Heisenberg chains

- Physics
- 2003

The mapping transformation technique is applied to obtain exact results for the spin-1/2 and spin-S (S = 1/2, 1) Ising–Heisenberg antiferromagnetic chain in the presence of an external magnetic…

Determinant representation for a quantum correlation function of the lattice sine - Gordon model

- Physics, Mathematics
- 1995

We consider a completely integrable lattice regularization of the sine - Gordon model with discrete space and continuous time. We derive a determinant representation for a correlation function which…

Staggered anisotropy parameter modification of the anisotropic /t-/J model

- Physics
- 2001

Abstract The anisotropic t–J model (Uq(gl(2|1)) Perk–Schultz model) with staggered disposition of the anisotropy parameter along a chain is considered and the corresponding ladder type integrable…

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