Anomalous relaxation and the high-temperature structure factor of XXZ spin chains
Anomalous relaxation and the high-temperature structure factor of XXZ spin chains
复制标题
XXZ自旋链的反常弛豫与高温结构因子
DOI:
10.1073/pnas.1906914116
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ware, Brayden
中科院分区:
文献类型:
--
作者:
Gopalakrishnan, Sarang;Vasseur, Romain;Ware, Brayden
We compute the spin-structure factor of XXZ spin chains in the Heisenberg and gapped (Ising) regimes in the high-temperature limit for nonzero magnetization, within the framework of generalized hydrodynamics, including diffusive corrections. The structure factor shows a hierarchy of timescales in the gapped phase, owing to-spin magnon bound states (“strings”) of various sizes. Although short strings move ballistically, long strings move primarily diffusively as a result of their collisions with short strings. The interplay between these effects gives rise to anomalous power-law decay of the spin-structure factor, with continuously varying exponents, at any fixed separation in the late-time limit. We elucidate the cross-over to diffusion (in the gapped phase) and to superdiffusion (at the isotropic point) in the half-filling limit. We verify our results via extensive matrix product operator calculations.
登录
查看更多内容
DOI:
10.1017/cbo9780511524332.002
发表时间:
1999-03
期刊:
--
影响因子:
--
作者:
Minoru Takahashi
通讯作者:
Minoru Takahashi
影响因子:
1.6
作者:
J. Quastel;H. Spohn
通讯作者:
J. Quastel;H. Spohn
影响因子:
8.6
作者:
Bonnes, Lars;Essler, Fabian H. L.;Lauchli, Andreas M.
通讯作者:
Lauchli, Andreas M.
影响因子:
3.7
作者:
Gopalakrishnan, Sarang;Huse, David A.;Vasseur, Romain
通讯作者:
Vasseur, Romain
影响因子:
3.7
作者:
Sirker, J.;Pereira, R. G.;Affleck, I.
通讯作者:
Affleck, I.