arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2101.07697quant-ph
收藏

含时磁场作用下自旋为1/2的耦合系统的量子不和谐动力学

Dynamics of quantum discord of two coupled spin-1/2 subjected to time-dependent magnetic fields

Roberto Grimaudo, Tatiana Mihaescu, Aurelian Isar, Iulia Ghiu, Antonino Messina

摘要:

本文描述了在可控含时磁场作用下两个自旋为1/2的相互作用系统的量子不和谐动力学。给出了由两个Bell态的经典混合态组成的各种输入混合态的不和谐的精确时间演化。量子不和谐表现出一个复杂的振荡行为的时间和比较的量子纠缠,测量的并发。详细研究了含时磁场和自旋耦合机制在量子关联发生和演化中的相互作用。

英文摘要:

We describe the dynamics of quantum discord of two interacting spin-1/2 subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell states. The quantum discord manifests a complex oscillatory behaviour in time and is compared with that of quantum entanglement, measured by concurrence. The interplay of the action of the time-dependent magnetic fields and the spin-coupling mechanism in the occurrence and evolution of quantum correlations is examined in detail.

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。

↑