Transition rates via Bethe ansatz for the spin-½ Heisenberg chain
Transition rates via Bethe ansatz for the spin-½ Heisenberg chain
复制标题
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:
影响因子:
--
通讯作者:
G. Muller
中科院分区:
文献类型:
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作者:
Daniel Biegel;M. Karbach;G. Muller
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.