Exact regimes of collapsed and extra two-string solutions in the two down-spin sector of the spin-1/2 massive XXZ spin chain
Exact regimes of collapsed and extra two-string solutions in the two down-spin sector of the spin-1/2 massive XXZ spin chain
复制标题
自旋 1/2 大规模 XXZ 自旋链的两个下自旋扇区中折叠和额外两串解的精确机制
DOI:
10.1088/1751-8121/aaf29f
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Tetsuo Deguchi
中科院分区:
文献类型:
--
作者:
Takashi Imoto;Jun Sato;Tetsuo Deguchi
We derive exactly the number of complex solutions with two down-spins in the massive regime of the periodic spin-1/2 XXZ spin chain of sites. Here we remark that every solution of the Bethe ansatz equations is characterized by a set of quantum numbers. We derive them analytically for all the complex solutions in the sector, which we call two-string solutions. We show that in a region of and the number of two-string solutions is by two larger than the number due to the string hypothesis, ie an extra pair of two-strings appears. We determine it exactly and also such regions where two-string solutions collapse for any positive integers. We illustrate the extra and standard two-string solutions numerically. In the sector we show that the string deviations are exponentially small with respect to if is large. We argue that for any finite solution of the spin-1/2 XXX chain there is such a solution of the spin-1/2 XXZ chain that has the same quantum numbers in common with the XXX solution.
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DOI:
--
发表时间:
1999
期刊:
arXiv: Condensed Matter
影响因子:
--
作者:
X. Zotos;F. Naef;P. Prelovšek
通讯作者:
P. Prelovšek
影响因子:
8.6
作者:
Schlottmann
通讯作者:
Schlottmann
影响因子:
5.4
作者:
N. Beisert;J. Minahan;M. Staudacher;K. Zarembo
通讯作者:
K. Zarembo
DOI:
10.1103/physrevb.33.4880
发表时间:
1986
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Schlottmann
通讯作者:
Schlottmann
影响因子:
1.7
作者:
Minoru Takahashi;Miki Yamada
通讯作者:
Miki Yamada