论文标题
高维系统中的纠缠保护
Entanglement protection in higher-dimensional systems
论文作者
论文摘要
纠缠量子系统与其环境的必然耗散相互作用导致系统中存在的量子相关性降解。这可能导致纠缠的有限时间消失，这被称为纠缠猝死（ESD）。在这里，我们考虑了最初纠缠的Qubit-Qutrit系统和导致ESD的耗散噪声，并提出了一组局部单一操作，当将其应用于值，QUTRIT或两个子系统上时，在磨层过程中，将ESD在其上急剧，延迟，延迟或避免使用，根据其时间的应用。在原子系统的背景下，讨论了这些本地单位的物理实施。此类ESD操作的仿真结果介绍了两种不同类别的最初纠缠Qubit-Qutrit系统的模拟结果。给出了该方案对Qutrit-Qutrit系统概括的处方。将这种在嘈杂环境中进行纠缠保护的技术与其他相关技术（例如弱测量逆转和动态解耦）进行了比较。
The inevitable dissipative interaction of an entangled quantum system with its environment causes degradation in quantum correlations present in the system. This can lead to a finite-time disappearance of entanglement, which is known as entanglement sudden death (ESD). Here, we consider an initially entangled qubit-qutrit system and a dissipative noise which leads to ESD, and propose a set of local unitary operations, which when applied on the qubit, qutrit, or both subsystems during the decoherence process, cause ESD to be hastened, delayed, or avoided altogether, depending on its time of application. The physical implementation of these local unitaries is discussed in the context of an atomic system. The simulation results of such ESD manipulations are presented for two different classes of initially entangled qubit-qutrit systems. A prescription for generalization of this scheme to a qutrit-qutrit system is given. This technique for entanglement protection in the noisy environment is compared with other related techniques such as weak measurement reversal and dynamic decoupling.
