Squeezing in Spinor Bose Condensates

挤压旋量玻色凝聚

• 批准号: 1102777
• 负责人: Michael Chapman
• 金额: $ 14.5万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2013-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1102777&HistoricalAwards=false
• 关键词: Squeezing; Spinor; Bose; Condensates

The primary goal of this research is to utilize spin-1 condensates to generate spin-squeezed states and to investigate their applications to enhanced quantum metrology. Spin squeezing and spin entanglement are important themes in ultra-cold atomic physics due to potential applications in precision metrology. Investigations of these phenomena will further basic understanding of interacting quantum spin systems. There is much interest in many-body physics beyond the mean field approximation and, in particular, in the creation and detection of nonclassical, quantum correlated states of the atomic fields. This research will probe the system size scale where mean-field semi-classical approaches break down and quantum calculations are required. We will access this nonclassical regime experimentally by using smaller condensates and employing state-of-the-art atom detection techniques providing atom counting precision better than the Poissonian fluctuation level of classical states. Ultra-cold atoms and molecules are important tools in studies of low-energy collisions, quantum degenerate gases (including Bose-Einstein condensates and degenerate Fermi gases) and precision measurements of fundamental constants and symmetries. Technological applications of these systems include precision sensors for navigation and magnetometry, atomic clocks and emerging quantum technologies including quantum information and communication.

本研究的主要目的是利用自旋1凝聚产生自旋压缩态，并探讨其在增强量子计量学中的应用。自旋压缩和自旋纠缠是超冷原子物理中的重要研究课题，在精密计量学中具有潜在的应用价值。 对这些现象的研究将进一步加深对相互作用量子自旋系统的基本认识。 人们对平均场近似之外的多体物理学非常感兴趣，特别是对原子场非经典量子相关态的创建和检测。 这项研究将探测系统的大小尺度，其中平均场半经典方法被打破，需要量子计算。 我们将通过使用更小的凝聚体和采用最先进的原子检测技术，提供比经典态的泊松波动水平更好的原子计数精度，来实验性地访问这个非经典制度。 超冷原子和分子是研究低能碰撞、量子简并气体（包括玻色-爱因斯坦凝聚和简并费米气体）以及精确测量基本常数和对称性的重要工具。这些系统的技术应用包括用于导航和磁力测量的精密传感器、原子钟以及包括量子信息和通信在内的新兴量子技术。