Multispinon Continua at Zero and Finite Temperature in a Near-Ideal Heisenberg Chain
Multispinon Continua at Zero and Finite Temperature in a Near-Ideal Heisenberg Chain
复制标题
DOI：
10.1103/physrevlett.111.137205
复制
发表时间：
2013-09-26
影响因子：
8.6
通讯作者：
Frost, C. D.
中科院分区：
文献类型：
--
作者：
Lake, B.;Tennant, D. A.;Frost, C. D.
多体量子系统依赖于空间和时间的响应是其涌现行为最具信息性的方面。动态结构因子，实验测量使用中子散射，可以映射这种响应的波矢量和能量非常详细，允许理论进行定量测试，以高精度。在这里，我们提出了一个一维自旋1/2海森堡反铁磁体KCuF 3的中子散射测量之间的比较，最近的国家的最先进的理论方法的基础上可积性和密度矩阵重整化群模拟。前所未有的定量协议表明，在所有的距离，时间和温度尺度的强关联态的精确描述现在是可能的，并强调需要将这些新技术应用于低维磁性的其他问题。
The space-and time-dependent response of many-body quantum systems is the most informative aspect of their emergent behavior. The dynamical structure factor, experimentally measurable using neutron scattering, can map this response in wave vector and energy with great detail, allowing theories to be quantitatively tested to high accuracy. Here, we present a comparison between neutron scattering measurements on the one-dimensional spin-1/2 Heisenberg antiferromagnet KCuF3, and recent state-of-the-art theoretical methods based on integrability and density matrix renormalization group simulations. The unprecedented quantitative agreement shows that precise descriptions of strongly correlated states at all distance, time, and temperature scales are now possible, and highlights the need to apply these novel techniques to other problems in low-dimensional magnetism.