INSPIRE: Classical Entanglement in Optical Science and Engineering

INSPIRE项目由MPS/PHY/原子、分子和光学实验物理（实验）、MPS/PHY/分子和光学物理（理论）和ENG/ECCS/电子、光子和磁性器件联合资助，由MPS多学科活动办公室和综合活动办公室共同资助。该项目涉及对光束的研究，在电信等领域具有重大进展的巨大潜力。要做的研究将包括理论研究和实验室演示。预计的结果包括利用“纠缠”原理大大简化通信技术，以前与宏观光束无关。纠缠指的是一种情况，在这种情况下，相隔很远的粒子无法相互独立地描述（或者，从数学上讲，当整体不等于各部分之和时）。该项目的目标是证明纠缠在非量子水平上的效用。非量子纠缠的简单存在正迅速被人们所接受。例如，获得将经典纠缠的宏观光束用于通信协议的能力将带来实用价值。这将避免与单个光子的产生、管理和注册相关的严格要求。在实践中，低于阈值的二极管激光将提供具有完全经典（热高斯）统计的宏观纠缠光束，功率计将提供不需要单个光子检测的检测能力。这种组合已经在实验室中得到证实。理想的经典特征是能够使用普通实验室设备获得超越两方水平的纠缠，以及存在随机随机性，可以在每个部分偏光的宏观光束中获得。一种不同于基于缠结的一夫一妻制的三方加性缠结不平等的新理论描述已经从正在进行的初步工作中出现。与量子信息和量子光学领域的双向有益交换似乎是可取的和可行的，例如在宏观层面实现光学多模纠缠交换协议。实验验证将阐明这一新理论在实际应用中的潜在效益。

This INSPIRE project is jointly funded by MPS/PHY/Atomic, Molecular and Optical Experimental Physics (Experimental), MPS/PHY/Molecular and Optical Physics (Theoretical), and ENG/ECCS/Electronic, Photonic and Magnetic Devices with co-funding from the MPS Office of Multidisciplinary Activities and the Office of Integrative Activities.This project involves research on beams of light, with high potential for significant advances in fields such as telecommunication. The research to be done will include theoretical studies as well as laboratory demonstrations. The projected results include dramatic simplifications of communication techniques that can come from exploitation of the principle of "entanglement", previously not associated with macroscopic light beams. Entanglement refers to the situation in which widely separated particles cannot be described independently of each other (or, mathematically, when the whole is not equal to the sum of its parts).The goal of the project is to demonstrate the utility of entanglement at the non-quantum level. The simple existence of non-quantum entanglement is quickly becoming accepted. Utility will come, for example, from acquiring the ability to use classically entangled macroscopic light beams for communications protocols. This will avoid the strict requirements associated with generation and management and registration of individual photons. In practice, below-threshold diode laser light will provide macroscopically entangled light beams with exactly classical (thermal Gaussian) statistics, and power meters will provide detection capability without individual photon detection. This combination has already been demonstrated in the laboratory. Desirable classical features are the ability to obtain entanglement beyond the two-party level with ordinary lab devices, as well as the existence of stochastic randomness, available in every partially polarized macroscopic light beam. A new theoretical description of three-party additive entanglement inequalities, distinct from tangle-based monogamy, has already emerged from ongoing preliminary work. Two-way beneficial exchanges with the fields of quantum information and quantum optics appear desirable and feasible, for example in implementing protocols for optical multi-mode entanglement swapping at the macroscopic level.Experimental verification will elucidate the potential benefits of this new theory in practical applications.