Atomic Coherence and Interference in a Coupled Atom-Cavity System

该奖项支持一项实验研究计划，该计划研究耦合腔-原子系统中的相干光子-原子相互作用，该系统由多个多层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。实验是用激光冷却铷原子在光学谐振腔中进行的。PI小组先前的工作表明，腔场和原子的集体耦合可以用来产生腔内暗态，并产生腔电磁感应透明。PI的研究小组还表明，自由空间激光场可以在耦合腔-原子系统中诱导破坏性干涉，并控制腔QED系统的量子态。计划中的实验将利用腔QED与自由空间激光场诱导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开关和大交叉相位调制等光控光现象。实验还将在空腔-原子系统中进行，该系统具有自由空间，多频率控制光场，可产生宽带电磁感应透明，这对多通道宽带光存储器的研究很有用。这项资助的研究将推进光子-原子相互作用的基础物理知识，导致新现象的发现，并导致相干光学技术的发展，应用于量子态操纵、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（一个少数民族研究所）进行，涉及研究生和本科生，特别是少数民族学生的贡献。研究项目采用先进的实验方法，采用先进的激光光学技术和光谱测量技术进行精密的实验，为研究生和本科生提供了与研究相关的教育和培训机会，使他们在从事科技事业时能够培养科学知识和技术技能。

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.