Transition rates via Bethe ansatz for the spin-½ Heisenberg chain

Transition rates via Bethe ansatz for the spin-½ Heisenberg chain
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来自 Bethe ansatz 的自旋 1/2 海森堡链的跃迁率

DOI:
10.1209/epl/i2002-00125-0
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发表时间:
2002
期刊:
EPL (Europhysics Letters)
影响因子:
--
通讯作者:
G. Muller
G. Muller
中科院分区:
--
文献类型:
--
作者:
Daniel Biegel;M. Karbach;G. Muller

文献摘要

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我们使用Kitanine、Maillet和Terras推导出的一维s = ½海森堡模型的Bethe波函数之间局部自旋算符矩阵元素的精确行列式表示来计算和数值评估与动态自旋结构因子相关的跃迁率。对于Bethe不等式的真实的解z1,.,zr,行列式的大小为r×r阶.我们目前的应用程序的零温度自旋涨落平行和垂直于外磁场。
We use the exact determinantal representation derived by Kitanine, Maillet, and Terras for matrix elements of local spin operators between Bethe wave functions of the one-dimensional s = ½ Heisenberg model to calculate and numerically evaluate transition rates pertaining to dynamic spin structure factors. For real solutions z1,…, zr of the Bethe ansatz equations, the size of the determinants is of order r×r. We present applications to the zero-temperature spin fluctuations parallel and perpendicular to an external magnetic field.