ITR: Twin Photons with Angular Momentum: Extending Entanglement for Quantum Information

ITR：具有角动量的双光子：扩展量子信息的纠缠

• 批准号: 0219382
• 负责人: Prem Kumar
• 金额: $ 41.7万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0219382&HistoricalAwards=false
• 关键词: ITR; Twin; Photons; Angular; Momentum

Twin photons have provided quantum optics with one of its most powerful tools to explore phenomena such as particle entanglement and the idea of teleportation of information, with additional glimpses of possible applications to quantum computation. Addition of angular momentum (AM) entanglement to the conjugated photon system in the parametric down conversion (PDC) process could extend entanglement to an unprecedented degree. It is the aim of this work to extend the fundamental knowledge on twin photons with angular momentum, which is in its early stages, and to determine the possibility of applications of these new ideas to Quantum Information Science. The specific plans include the following. 1) A coincidence experiment to confirm the angular correlations of entangled photons with angular momentum that have been predicted theoretically will be performed. 2) A second coincidence experiment will be done as a test for a possible application in optical fibers. 3) Light states entangled both in angular momentum and polarization will be created by a combination of path indistinguishability to produce multi-entanglement between entangled polarization states and entangled angular momentum states. The experimental efforts will be accompanied by theoretical studies.

双光子为量子光学提供了最强大的工具之一，可以探索粒子纠缠和信息隐形传态等现象，并进一步了解量子计算的可能应用。在参量下转换（PDC）过程中向共轭光子系统中加入角动量（AM）纠缠可以将纠缠扩展到前所未有的程度。 这项工作的目的是扩展关于具有角动量的孪生光子的基础知识，这是在其早期阶段，并确定这些新思想应用于量子信息科学的可能性。具体计划包括以下内容。1)将进行符合实验以证实理论上预测的具有角动量的纠缠光子的角关联。2)第二个符合实验将作为一个可能的应用在光纤中的测试。 3)利用光路不可逆性的结合，可以产生角动量和偏振态的纠缠态，从而在纠缠偏振态和纠缠角动量态之间产生多重纠缠。 实验工作将伴随着理论研究。