arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.08657quant-ph
收藏

量子纠缠的分布:原理与应用

Distribution of quantum entanglement: Principles and applications

Tanjung Krisnanda

摘要:

量子纠缠是量子粒子间的一种关联形式,它已成为量子信息和通信科学的重要组成部分。例如,它已被证明能够实现或增强量子处理任务,如量子密码学、量子隐形传态和量子计算。然而,由于与环境散射体的相互作用,量子纠缠容易发生退相干,使其成为昂贵的资源。因此,理解它的创造至关重要。我们把注意力集中在一种情况下,人们希望在分开的主粒子之间分配量子纠缠。在这种情况下,有必要使用在它们之间通信或与它们持续交互的辅助系统。Cupertino等人表明,辅助系统不需要与主粒子纠缠以分散纠缠。这已经在通信辅助粒子的情况下通过实验证明,现在已知分布式纠缠的界限由通信量子不和谐给出。另一方面,很少有人了解的设置与连续的相互作用,尽管它在自然界中大量发生。本论文的主要内容是研究量子纠缠通过与辅助粒子(我称之为介体)的连续相互作用的分布。我将介绍我的工作有关的必要条件,纠缠分配,相关的因素是分配量,以及速度限制,以实现最大的纠缠增益。最后,我提出了一些值得注意的应用程序,可以从我们的工作中受益。这包括间接探测光机械镜、光合生物和引力相互作用的量子性质。

英文摘要:

Quantum entanglement is a form of correlation between quantum particles that has now become a crucial part in quantum information and communication science. For example, it has been shown to enable or enhance quantum processing tasks such as quantum cryptography, quantum teleportation, and quantum computing. However, quantum entanglement is prone to decoherence as a result of interactions with environmental scatterers, making it an expensive resource. Therefore, it is crucial to understand its creation. We centre our attention to a situation where one would like to distribute quantum entanglement between principal particles that are apart. In this case, it is necessary to use ancillary systems that are communicated between them or interact with them continuously. Cubitt et al. showed that the ancillary systems need not be entangled with the principal particles in order to distribute entanglement. This has been demonstrated experimentally in the case of communicated ancillary particles and it is now known that the bound on the distributed entanglement is given by a communicated quantum discord. On the other hand, little is understood about the setting with continuous interactions, despite its abundant occurrence in nature. The main focus of this thesis is to study the distribution of quantum entanglement via continuous interactions with ancillary particles, which I will call mediators. I will present my work regarding the necessary conditions for entanglement distribution, the factors that are relevant for the distributed amount, and the speed limit to achieving maximum entanglement gain. Finally, I present some notable applications that can benefit from our work. This includes, among others, indirect probing of the quantum nature of optomechanical mirrors, photosynthetic organisms, and gravitational interactions.

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。

↑