Controlling Nonlinear and Quantum Dynamics in Multi-Level Coherent Media

控制多级相干介质中的非线性和量子动力学

• 批准号: 0652970
• 负责人: Min Xiao
• 金额: $ 37.6万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0652970&HistoricalAwards=false
• 关键词: Controlling; Nonlinear; Quantum; Dynamics; Multi

Atomic coherence and quantum interference effects in multi-level atomic systems have attracted great attention in the past decade. Many interesting effects have been observed experimentally such as electromagnetically induced transparency (EIT), dramatic slowing of the speed of light, storage of light pulses in atomic assembles, and enhanced nonlinear optical processes. The research supported by this grant will include studies of nonlinear and quantum dynamical effects in multi-level atomic systems interacting with extremely weak laser beams (at the single-photon level). These studies will increase fundamental understanding of basic physics and lead to discoveries of novel effects. Both linear and nonlinear optical properties in multi-level systems will be greatly modified and controlled experimentally by the induced atomic coherence. Additionally these multi-level atoms will be placed inside an optical cavity so that additional interesting nonlinear and quantum dynamical phenomena can be studied, such as controlling chaos, single-photon switching, quantum logic gates, and quantum tunneling. These fundamental investigations will lead to new discoveries and novel design concepts for optoelectronic devices. Understanding and controlling nonlinear and quantum dynamical behaviors (such as chaos, stochastic resonance, and tunneling) in these well-controlled laboratory systems can have great impacts in many other areas of sciences with similar complicated nonlinear dynamical behaviors, such as climate, chemistry, biological science, medical science, and other branches of physics. Investigations of nonlinear and quantum effects in the multi-level coherent EIT systems with low light intensities will be essential in developing single-photon all-optical switching or quantum logic gates for quantum information processing and quantum networking, and contributing to future technology advances. Another important benefit in the proposed research is training graduate and undergraduate students working in the fundamental and applied research projects in modern optical laboratory.

多能级原子系统中的原子相干性和量子干涉效应在过去十年中引起了人们的极大关注。许多有趣的效应已经被实验观察到，如电磁感应透明（EIT），光速的显着减慢，光脉冲在原子集合中的存储，以及增强的非线性光学过程。这项资助支持的研究将包括研究与极弱激光束（单光子水平）相互作用的多能级原子系统中的非线性和量子动力学效应。 这些研究将增加对基础物理学的基本理解，并导致新效应的发现。多能级系统的线性和非线性光学性质都将通过诱导原子相干性而得到极大的改变和控制。此外，这些多能级原子将被放置在光学腔中，以便研究其他有趣的非线性和量子动力学现象，如控制混沌，单光子开关，量子逻辑门和量子隧道。这些基础研究将导致新的发现和光电器件的新设计概念。理解和控制这些受控实验室系统中的非线性和量子动力学行为（例如混沌、随机共振和隧道效应）可以对具有类似复杂非线性动力学行为的许多其他科学领域产生巨大影响，例如气候、化学、生物科学、医学科学和其他物理学分支。研究低光强下多能级相干EIT系统中的非线性和量子效应对于发展用于量子信息处理和量子网络的单光子全光开关或量子逻辑门以及未来的技术进步至关重要。在拟议的研究中的另一个重要的好处是培养研究生和本科生在现代光学实验室的基础和应用研究项目工作。