EAGER: Coherent Manipulation and Quantum Entanglement in Ultracold Reactions

EAGER：超冷反应中的相干操纵和量子纠缠

• 批准号: 2332539
• 负责人: Kang-Kuen Ni
• 金额: $ 30万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-08-01 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2332539&HistoricalAwards=false
• 关键词: EAGER; Coherent; Manipulation; Quantum; Entanglement

With support from the Chemical Structure, Dynamics, and Mechanisms-A (CSDM-A) Program in the Division of Chemistry, Professor Kang-Kuen Ni of Harvard University will use sophisticated laser techniques to explore quantum entanglement between product states of a chemical reaction. Quantum entanglement is a key concept at the heart of quantum information science (QIS) whereby two particles can occupy a shared quantum state, even when separated over long distances. While entanglement between electron and nuclear spins in, for example, isolated ions and the metal centers in inorganic coordination complexes have been observed, the idea that the product states in a chemical reaction could be entangled has not been explored. Professor Ni and her group will first generate entangled nuclear-spin states with the reactants then will leverage the conservation of the reactant nuclear spins throughout the reaction to establish whether or how long coherence is preserved in reaction products. Confirming generations of entanglement product pairs from chemical reaction would expand the known ways that entanglement can be created and allow chemical systems to enter the list with added benefits such as their degrees of freedom that allow for their trapping and manipulation. Professor Ni will work with high school, undergraduate, and graduate students in this research thus positively impacting the Nation's quantum-enabled workforce.The role of quantum entanglement between the product states in a simple chemical reaction (2KRb -- K2 + Rb2) is being explored to establish whether and how long phase coherence is preserved in the chemical reaction products. To do so, entangled nuclear-spin states within the individual reactants will first be generated. The conservation of the reactant nuclear spins throughout the reaction will be measured using two-photon Raman-based approaches to establish coherence between the various products. Product population correlation will be probed by a combination of resonant enhanced 2-photon ionization and coincident detection. Results from this simple chemical reaction have the potential to serve as a blueprint for understanding quantum entanglement in more complex chemical reactions and thus have the potential to forge a quantitative connection between chemical reaction dynamics and quantum information science.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

哈佛大学的倪康坤教授将在化学系化学结构、动力学和机理-A（CSDM-A）项目的支持下，利用先进的激光技术，探索化学反应产物态之间的量子纠缠。量子纠缠是量子信息科学（QIS）核心的一个关键概念，两个粒子可以占据一个共享的量子态，即使在长距离分离时也是如此。虽然已经观察到电子和核自旋之间的纠缠，例如，孤立的离子和无机配位络合物中的金属中心，但化学反应中的产物态可以纠缠的想法尚未被探索。Ni教授和她的团队将首先用反应物产生纠缠的核自旋态，然后利用反应物核自旋在整个反应过程中的守恒来确定反应产物中是否保持或保持多长时间的相干性。从化学反应中识别纠缠产物对的世代将扩展可以创建纠缠的已知方式，并允许化学系统进入列表，并具有额外的好处，例如它们的自由度，允许它们的捕获和操纵。倪教授将与高中生、本科生和研究生一起进行这项研究，从而对国家的量子使能劳动力产生积极影响。正在探索简单化学反应（2KRb -- K2 + Rb 2）中产物态之间的量子纠缠的作用，以确定化学反应产物中是否以及在多长时间内保持相位相干。要做到这一点，首先会在单个反应物中产生纠缠的核自旋态。整个反应过程中反应物核自旋的守恒将使用基于双光子拉曼的方法来测量，以建立各种产物之间的相干性。将通过共振增强双光子电离和符合检测的组合来探测产物群体相关性。这个简单的化学反应的结果有可能成为理解更复杂化学反应中量子纠缠的蓝图，从而有可能在化学反应动力学和量子信息科学之间建立定量联系。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估而被认为值得支持。