ExpandQISE: Track 1: Harnessing a scalable platform to demonstrate multipartite quantum effects under strict conditions

非技术摘要：量子纠缠是一种迷人的现象，量子粒子可以被很远的距离分开，并表现出超越经典物理学可能的相关性。纠缠有望彻底改变网络环境中的通信，其中多个分离的用户有一天将拥有并共享纠缠的量子粒子：未来的“量子互联网”。该项目的目标是利用一个新的实验平台正在建立在博尔德，科罗拉多，以证明纠缠效应，如纠缠测量和多方纠缠态。通过与新奥尔良大学的合作，这项工作将作为一个培训平台，在本科生和研究生中建立专业知识，为能够解决未来问题的量子培训劳动力的出现提供关键推动力。 技术摘要：该项目的量子网络方法是基于预示的路径纠缠光子态。通过在中心节点上进行适当的测量和操作，可以使用由多方产生的预示纠缠态来创建真正的多体纠缠。预言避免了后选择分析，这在试图通过干扰仅概率性地产生纠缠粒子对的多个源来见证多体纠缠时变得必要，例如在自发参数下转换中。因此，这个预示着的设置非常适合这个项目的核心科学问题：用最少的辅助假设来明确地证明超越两方纠缠的多方纠缠效应，例如纠缠测量和多方纠缠态。该项目支持研究如何最好地测量和表征由此产生的多体相关性，以及如何进行仔细的统计分析来测试约束，这些约束的违反表明存在更复杂的纠缠态和测量，扩展了为第一代2方贝尔实验开发的方法。该项目由多学科活动办公室（MPS/OMA）联合资助，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，被认为值得支持。

Non-technical Abstract: Quantum entanglement is a fascinating phenomenon whereby quantum particles can be separated by great distances and demonstrate correlations that go beyond what is possible with classical physics. Entanglement holds great promise to revolutionize communication in network settings where multiple separated users will someday possess and share entangled quantum particles: the "quantum internet" of the future. The objective of this project is to harness a novel experimental platform being built in Boulder, Colorado to demonstrate entangled effects such as entangled measurements and multi-party entangled states. Through a partnership with the University of New Orleans, this work will serve as a training platform to build expertise among undergraduate and graduate students, providing a critical boost to the emergence of a quantum-trained workforce capable of tackling the problems of tomorrow. Technical Abstract: This project’s approach to quantum networking is based on heralded path-entangled photonic states. Heralded entangled states generated by multiple parties can be used to create genuine multipartite entanglement through appropriate measurements and operations at a central node. Heralding avoids post-selection analysis, which becomes necessary when attempting to witness multipartite entanglement by interfering multiple sources that generate entangled particle pairs only probabilistically, such as in spontaneous parametric down-conversion. The heralded setup is thus well suited for the central scientific problem of this project: to definitively demonstrate, with minimal auxiliary assumptions, multi-party entangled effects that go beyond two-party entanglement alone, such as entangled measurements and multi-party entangled states. This project supports research on how to best measure and characterize the resulting multipartite correlations, and how to perform careful statistical analysis to test constraints whose violation indicate the presence of more sophisticated entangled states and measurements, extending methods that were developed for first generation of 2-party Bell experiments.This project is jointly funded by The Office of Multidisciplinary Activities (MPS/OMA), the Established Program to Stimulate Competitive Research (EPSCoR), and Technology Frontiers Program (TIP/TF).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.