2 papers
quant-ph2004
Effects of staggered magnetic field on entanglement in the anisotropic XY model
Zhe Sun, XiaoGuang Wang, You-Quan Li
We investigate effects of staggered magnetic field on thermal entanglement in the anisotropic XY model. The analytic results of entanglement for the two-site cases are obtained. Fo…
cond-mat1996
Exact results of a hard-core interacting system with a single impurity
You-Quan Li, Zhong-Shui Ma
The quantum-mechanical problem of a many-particle system with a single impurity in one-dimension, interacting by a delta-function, is solved. The wave-function for a bosonic system…