通过自旋链动力学的量子通信：介绍性综述
Quantum Communication through Spin Chain Dynamics: an Introductory Overview
摘要：
我们提出了一个介绍性的概述，使用自旋链量子线，最近已发展成为一个话题的生动的兴趣。主要的动机是在不诉诸光学的情况下连接量子寄存器。自旋链是永久耦合的一维自旋系统。当把一个量子态放在它的一端时，如果自旋通过交换相互作用耦合，那么这个态将以一定的效率动态地传输到另一端。为此目的，不需要在链条的主体上进行外部调制或测量，除非可能在最末端。然而，对于最简单的（均匀耦合的）链和最简单的编码（单量子比特编码），色散降低了传输的质量。我们提出了不同的小组提出的各种替代方案，以实现完美的量子态转移通过自旋链。最后，我们简要讨论了这个主题发展的各个方向。
英文摘要：
We present an introductory overview of the use of spin chains as quantum wires, which has recently developed into a topic of lively interest. The principal motivation is in connecting quantum registers without resorting to optics. A spin chain is a permanently coupled 1D system of spins. When one places a quantum state on one end of it, the state will be dynamically transmitted to the other end with some efficiency if the spins are coupled by an exchange interaction. No external modulations or measurements on the body of the chain, except perhaps at the very ends, is required for this purpose. For the simplest (uniformly coupled) chain and the simplest encoding (single qubit encoding), however, dispersion reduces the quality of transfer. We present a variety of alternatives proposed by various groups to achieve perfect quantum state transfer through spin chains. We conclude with a brief discussion of the various directions in which the topic is developing.
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。
