Atomic Coherence and Interference in a Coupled Atom-Cavity System

原子腔耦合系统中的原子相干性和干涉

• 批准号: 1205565
• 负责人: Yifu Zhu
• 金额: $ 41万
• 依托单位: Florida International University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1205565&HistoricalAwards=false
• 关键词: Atomic; Coherence; Interference; Coupled; Atom

This award supports an experimental research program that studies coherent photon-atom interactions in a coupled cavity-atom system consisting of multiple multi-level atoms interacting with one or two cavity modes and also with free-space laser fields. The experiments are carried out with laser-cooled rubidium atoms confined in an optical resonator. The prior work of the PI's group showed that the collective coupling of the cavity field and atoms can be used to produce the intra-cavity dark state and create cavity electromagnetically induced transparency. The PI's group also showed that the free-space laser field can be used to induce the destructive interference in the coupled cavity-atom system and control the quantum states of the cavity QED system. The planned experiments will use such interplay of the cavity QED and the quantum interference induced by the free-space laser fields to obtain large optical nonlinearities and to study light control light phenomena such as all-optical switching and large cross-phase modulation at ultra-low light intensities. The experiments will also be carried out in the cavity-atom system with a free-space, multi-frequency control light field that creates broadband electromagnetically induced transparency, which is useful for studies of a multichannel, broadband light memory. The funded research will advance knowledge of the fundamental physics of photon-atom interactions, lead to discoveries of new phenomena, and result in the development of coherent optical techniques for applications in quantum state manipulation, spectroscopic measurements, light-control-light photonic devices, and storage and conversion of quantum information. The research activities are carried out at Florida International University (a minority institute) and involve contributions from graduate and undergraduate students, particularly minority students. The research projects use advanced experimental methods and perform sophisticated experiments with advanced laser optical techniques and spectroscopic measurements, which offers research related education and training opportunities for the graduate and undergraduate students and enable them to develop scientific knowledge and technical skills in their pursuit of scientific and technological careers.

该奖项支持一项实验研究项目，该项目研究耦合腔原子系统中的相干光子原子相互作用，该系统由多个多级原子与一个或两个腔模式以及自由空间激光场相互作用组成。该实验是用限制在光学谐振腔中的激光冷却铷原子进行的。 PI团队的先前工作表明，腔场和原子的集体耦合可用于产生腔内暗态并产生腔电磁感应透明度。 PI团队还表明，自由空间激光场可用于在耦合腔-原子系统中引发相消干涉，并控制腔QED系统的量子态。计划中的实验将利用腔 QED 和自由空间激光场引起的量子干涉的相互作用来获得大的光学非线性，并研究超低光强下的全光切换和大交叉相位调制等光控光现象。这些实验还将在具有自由空间、多频率控制光场的空腔原子系统中进行，该光场可产生宽带电磁感应透明度，这对于多通道、宽带光存储器的研究非常有用。 资助的研究将增进对光子-原子相互作用的基础物理知识的了解，导致新现象的发现，并导致相干光学技术的发展，用于量子态操纵、光谱测量、光控光光子器件以及量子信息的存储和转换。研究活动在佛罗里达国际大学（少数族裔研究所）进行，并涉及研究生和本科生，特别是少数族裔学生的贡献。研究项目采用先进的实验方法，利用先进的激光光学技术和光谱测量进行复杂的实验，为研究生和本科生提供与研究相关的教育和培训机会，使他们在追求科技事业的过程中发展科学知识和技术技能。