Quantum Measurements for Continuous-Variable States with Photon Counting

使用光子计数进行连续可变态的量子测量

基本信息

批准号：
2210447
负责人：
Francisco Becerra Chavez
金额：
$ 45万
依托单位：
University of New Mexico
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2022
资助国家：
美国
起止时间：
2022-08-01 至 2025-07-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2210447&HistoricalAwards=false
关键词：
Quantum Measurements Continuous Variable States

项目摘要

Measurement of the state of an optical field is at the center of many technological applications across physics and engineering including optical communications, sensing and metrology, and information processing. When the optical state encodes information, optimal or near optimal measurements allow for decoding this information efficiently and reliably, enhancing the performance of different protocols in communications and information processing. The design and optimization of measurements critically depend on the intrinsic properties of the optical states and the available resources in the measurement to be realized. This project will investigate optimal and near optimal quantum measurements for optical states comprised of coherent states (light from lasers) and state superpositions, based on photon counting measurements and optimized coherent displacement operations. Optimized measurements for coherent states and their superpositions can provide a new tool for protocols in all-optical quantum information processing and long-distance quantum communications. Furthermore, the design of efficient quantum measurements for optical quantum states is essential for current and future developments in photonic quantum technologies, which are the subject of many academic and industrial efforts worldwide.Quantum measurement theory provides a fundamental understanding of the limits on the achievable sensitivity for determining the states of quantum systems. This project will demonstrate optimized quantum measurements for coherent states and their superpositions for applications in quantum communications, information processing, and computation. These optimized measurements are based on photon counting, coherent displacement operations, and adaptive measurements, which will allow for the design of a wide class of optimized quantum measurements for diverse states and measurement problems. The proposed quantum measurements of coherent states seek to realize complex projective and non-projective measurements with fidelities and sensitivities for state projection and discrimination beyond the reach of standard measurement paradigms including Gaussian measurements (homodyne/heterodyne). The project will advance new knowledge through the development of experimental techniques for ultrasensitive optical measurements with high fidelity, and through theoretical methods for the design and optimization of complex quantum measurements with finite resources. Theoretical efforts will focus on quantum measurements of coherent states and their superpositions based on photon counting, coherent displacements, and adaptive strategies. Experimental efforts will focus on the demonstrations of these strategies in tabletop experiments.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.

光场状态的测量位于物理和工程中许多技术应用的中心，包括光学通信，传感和计量以及信息处理。当光学状态编码信息时，最佳或接近最佳的测量允许有效，可靠地解码此信息，从而增强通信和信息处理中不同协议的性能。测量值的设计和优化主要取决于要实现的测量中光态的内在特性以及可用资源。该项目将根据光子计数测量值和优化的相干位移操作，研究由相干状态（激光器的光）和状态叠加组成的光学状态（来自激光器的光）和状态叠加的最佳量子测量。相干状态及其叠加的优化测量可以为全光量子信息处理和长距离量子通信提供新的工具。此外，光量子状态的有效量子测量的设计对于光子量子技术的当前和未来发展至关重要，光子量子技术是全球许多学术和工业努力的主题。Quantum测量理论提供了对确定量子系统状态的可实现灵敏度的基本了解。该项目将展示针对量子通信，信息处理和计算中应用的相干状态及其叠加的优化量子测量。这些优化的测量基于光子计数，相干位移操作和自适应测量值，这将允许设计各种优化的量子测量，以解决各种状态和测量问题。拟议的相干状态的量子测量试图实现复杂的投射和非项目的测量，并以忠诚度和对状态投影和歧视的敏感性，超出标准测量范式的范围，包括高斯测量（包括高斯测量）（同源性/异性恋）。该项目将通过开发具有高保真度的超敏化光学测量的实验技术，以及通过有限资源设计和优化复杂的量子测量值的理论方法来促进新知识。理论上的工作将集中于基于光子计数，相干位移和自适应策略的相干状态及其叠加的量子测量。实验努力将重点放在桌面实验中的这些策略的演示上。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响审查标准，被认为值得通过评估来获得支持。