Dynamic Correlation Functions for Quantum Spin Chains
Dynamic Correlation Functions for Quantum Spin Chains
复制标题
量子自旋链的动态相关函数
DOI：
10.1103/physrevlett.51.219
复制
发表时间：
1983
影响因子：
8.6
通讯作者：
R. Shrock
中科院分区：
文献类型：
--
作者：
G. Müller;R. Shrock
对于一维一维FRAC{1}{2}$各向同性模型和临界场上的横切伊辛模型，给出了自相关函数的长时间渐近展开式及其含频傅立叶变换的先导奇点的新的精确结果.给出了后一种函数的高精度数值计算，并对发现的函数行为进行了实验观察。
New exact results are presented on the long-time asymptotic expansions of the $T=0$ autocorrelation functions, and on the leading singularities of their frequency-dependent Fourier transforms, for the one-dimensional $S=\frac{1}{2}$ isotropic $\mathrm{XY}$ model and the $S=\frac{1}{2}$ transverse Ising model at the critical field. High-precision numerical calculations of the latter functions are also given, and experiments are proposed to observe the functional behaviors that are found.