Integrability of a disordered Heisenberg spin-1/2 chain
Integrability of a disordered Heisenberg spin-1/2 chain
复制标题
无序海森堡自旋 1/2 链的可积性
DOI：
10.1088/0305-4470/37/17/004
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
Lea F. Santos
中科院分区：
文献类型：
--
作者：
Lea F. Santos
我们通过改变有缺陷的海森堡自旋 1/2 链的哈密顿量参数来研究如何从可积性到不可积性的转变发生。随机分布的缺陷可能导致量子混沌。在链边缘存在单个缺陷的情况下也会出现类似的行为，这表明随机性并不是这些系统中混乱的原因，而仅仅是缺陷的存在。
We investigate how the transition from integrability to nonintegrability occurs by changing the parameters of the Hamiltonian of a Heisenberg spin-1/2 chain with defects. Randomly distributed defects may lead to quantum chaos. A similar behaviour is obtained in the presence of a single defect out of the edges of the chain, suggesting that randomness is not the cause of chaos in these systems, but the mere presence of a defect.