$S=1/2$自旋链中磁性杂质的交错磁化和纠缠增强
Staggered magnetization and entanglement enhancement by magnetic impurities in $S=1/2$ spin chain
摘要：
研究了磁性杂质对$S=1/2$自旋链行为的影响。在T=0时，无论是否施加均匀磁场，都会出现振荡磁化，其随离杂质距离的衰减遵循幂律。因此，成对纠缠要么增强要么淬灭，这取决于自旋对相对于杂质的距离以及磁场的值和杂质本身的强度。这使我们建议，这样的控制参数，绝热操纵的纠缠分布可以执行。我们的结果对温度的鲁棒性进行了检查，并提出了可能的实验应用的建议。
英文摘要：
We study the effects of a magnetic impurity on the behavior of a $S=1/2$ spin chain. At T=0, both with and without an applied uniform magnetic field, an oscillating magnetization appears, whose decay with the distance from the impurity is ruled by a power law. As a consequence, pairwise entanglement is either enhanced or quenched, depending on the distance of the spin pair with respect to the impurity and on the values of the magnetic field and the intensity of the impurity itself. This leads us to suggest that acting on such control parameters, an adiabatic manipulation of the entanglement distribution can be performed. The robustness of our results against temperature is checked, and suggestions about possible experimental applications are put forward.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
