Generation, Measurement, and Preservation of Entanglement Using Cavity QED And Optical Lattices

使用腔 QED 和光学晶格产生、测量和保存纠缠

• 批准号: 0555572
• 负责人: Perry Rice
• 金额: $ 13.5万
• 依托单位: Miami University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-06-01 至 2009-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0555572&HistoricalAwards=false
• 关键词: Generation; Measurement; Preservation; Entanglement; Using

Examination of a simple open system, atoms in a driven cavity, withexternal trapping potentials, including spontaneous emission and cavity loss, will be investigated. The work will explore how to quantify entanglement for mixed quantum states, which is still an open question. A system with many atoms will also facilitate studies of multipartite entanglement, also not well understood to date.The project begins with studies of entanglement in single atom cavity QED usingcorrelation functions, to systems of a few atoms, trapped inside potential wells in anoptical cavity. This will extend our knowledge of entanglement in open quantum systems,and multipartite systems. Probabilistic generation of entanglement andits distribution, as studied experimentally by the groups of Lukin, Kimble andKuzmich, will be treated. Feedback to protect quantum states has been experimentallydemonstrated in cavity QED. Many feedback and control schemes utilize a Gaussiannoise approximation; the work will go beyond that, looking at systems of a few atoms/photons. In the second phase of the project investigations of atom cavity states useful for variouscluster state and one-way quantum computation schemes, as well as implementations ofquantum networks of CQED systems, will be studied. The cavity may serve several purposes: the strong coupling to the optical mode may be used to obtain information on the atomic state (bymonitoring, e.g., the transmitted light) that might be difficult to access otherwise; it mayalso provide a way to manipulate the joint atomic state, and prepare interesting or usefulentangled atomic superpositions. Finally, quantum information processingwith cavities outside the strong coupling limit, will be examined, as they are much easier to implement experimentally. Close collaboration with the experimental group of Luis Orozco at theUniversity of Maryland, and others, will help focus the work on physically realizableschemes.

我们将研究一个简单的开放系统，原子在驱动腔中，外加势阱，包括自发辐射和腔损耗。 这项工作将探索如何量化混合量子态的纠缠，这仍然是一个悬而未决的问题。 具有多个原子的系统也将促进多体纠缠的研究，但迄今为止还没有很好地理解。该项目首先使用相关函数研究单原子腔QED中的纠缠，研究被困在光学腔势威尔斯内的几个原子的系统。这将扩展我们在开放量子系统和多体系统中的纠缠知识。Lukin，Kimble和Kuzmich等人在实验上研究了纠缠的概率产生及其分布。在腔QED中，反馈保护量子态的作用已得到实验证实。许多反馈和控制方案利用高斯噪声近似;工作将超越这一点，着眼于几个原子/光子的系统。在第二阶段的计划中，我们将研究原子腔态，这些腔态可用于各种团簇态和单向量子计算方案，以及实现CQED系统的量子网络。腔可以用于几个目的：与光学模式的强耦合可以用于获得关于原子状态的信息（通过监测，例如，透射光），否则可能很难获得;它也可能提供一种方法来操纵联合原子状态，并准备有趣或有用的纠缠原子叠加。 最后，将研究强耦合极限之外的腔的量子信息处理，因为它们更容易在实验上实现。与马里兰州大学的路易斯·奥罗斯科实验小组和其他人的密切合作，将有助于把工作重点放在物理上可实现的方案上。