论文标题
本科实验室的量子钥匙分布的演示
A Demonstration of Quantum Key Distribution with Entangled Photons for the Undergraduate Laboratory
论文作者
论文摘要
现在，不确定性和度量的基本量子原则已成为提供两个交流方之间保密的新技术的基础，因此有必要提供教学实验室来说明这些技术的工作方式。在本文中，我们描述了一种实验室练习，其中学生用单个光子执行量子密钥分布，并查看如何通过量子叠加和状态投影原理确保通信的保密性。我们使用了类似于相关的photon本科实验室的台式设备，以实现具有极化输入光子的Bennett-Brassard-84方案。我们的实验表明了两个政党之间的沟通如何被窃听者破坏。我们使用一个简单的石英板来模仿窃听器的截距，测量和重新启动通信中使用的光子，并分析光的状态以显示窃听器如何改变它。
Now that fundamental quantum principles of indeterminacy and measurement have become the basis of new technologies that provide secrecy between two communicating parties, there is a need to provide teaching laboratories that illustrate how these technologies work. In this article we describe a laboratory exercise in which students perform quantum key distribution with single photons, and see how the secrecy of the communication is ensured by the principles of quantum superposition and state projection. We used a table-top apparatus, similar to those used in correlated-photon undergraduate laboratories, to implement the Bennett-Brassard-84 protocol with polarization-entangled photons. Our experiment shows how the communication between two parties is disrupted by an eavesdropper. We use a simple quartz plate to mimic how an eavesdropper intercepts, measures, and resends the photons used in the communication, and we analyze the state of the light to show how the eavesdropper changes it.
