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arXiv math-ph/9907019math-phcond-mat.stat-mechhep-thmath.MPmath.QAnlin.SIsolv-int
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磁场中自旋为1/2的XXZ海森堡链的关联函数

Correlation functions of the XXZ Heisenberg spin-1/2 chain in a magnetic field

N. Kitanine, J. M. Maillet, V. Terras

摘要:

利用代数Bethe近似方法,通过求解局域自旋的量子逆散射问题,得到了XXZ海森堡自旋- $1 \over 2$链在恒定磁场中$n$ -点关联函数的多重积分表示.对于零磁场,这个结果同意,在无质量和有质量(反铁磁)的制度,从q-变形KZ方程(无质量制度)和量子仿射代数${\cal U}_q (\hat{sl}_2)$的表示理论与角转移矩阵方法(有质量制度)。

英文摘要:

Using the algebraic Bethe ansatz method, and the solution of the quantum inverse scattering problem for local spins, we obtain multiple integral representations of the $n$-point correlation functions of the XXZ Heisenberg spin-$1 \over 2$ chain in a constant magnetic field. For zero magnetic field, this result agrees, in both the massless and massive (anti-ferromagnetic) regimes, with the one obtained from the q-deformed KZ equations (massless regime) and the representation theory of the quantum affine algebra ${\cal U}_q (\hat{sl}_2)$ together with the corner transfer matrix approach (massive regime).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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