Strong-Coupling of Quantum Dots and Micro-cavities for Efficient Single and Double Photon Sources and Quantum Logic

量子点和微腔的强耦合，用于高效的单双光子源和量子逻辑

• 批准号: 0323141
• 负责人: Michael Raymer
• 金额: $ 27万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0323141&HistoricalAwards=false
• 关键词: Strong; Coupling; Quantum; Dots; Micro

0323141RaymerThe PI will implement a novel approach for reaching the cavity-QED strong-coupling regime with a single semiconductor quantum dot (QD) and a mode of an optical micro-cavity. Such coupling, not yet achieved in any laboratory, implies that a single photon can strongly drive the QD, and that emission from an excited-state QD will occur deterministically and predominantly into a single mode of the light field. This extreme degree of control at the single-quantum level will potentially enable the PI to develop several useful applications in Quantum Information Processing:1. Deterministic production of single photons on demand (useful for ensuring the security of quantum cryptography);2. Writing and reading of quantum information into and out of material systems;3. Deterministic production of pairs of polarization-entangled photons on demand (useful as a resource for quantum communication or for linear-optics computing);4. Quantum information processing or computing.The immediate goal will be to demonstrate that the external-cavity system already constructed in our laboratory will provide a sufficient level of coherent coupling between a QD and an optical cavity mode to meet requirements for QD-based Quantum Information Processing (QIP). The second goal during the 3-year funded period will be items 1 and 2 above. The research will contribute to a potential revolution in communications technology if quantum techniques truly become operable. The research here will contribute to the development of efficient solid-state sources of single photons and photon pairs, as well as the coherent control of single quantum dots that is needed for manipulating electronic and spin states in these systems for quantum computing. Quantum Information Science is popular with students - both graduate and undergraduate. It is attracting students into research. Undergraduates, including male and female, have worked on the project. The project has also attracted visiting scientists and students from abroad, providing a culturally broadening experience for the students. The material is finding its way into undergraduate and graduate-level courses. The PI recently initiated and taught a new course at the level of undergraduate non-science majors, called The Physics Behind the Internet, for which he has recently authored a textbook.

0323141 Raymer PI将实施一种新颖的方法，通过单个半导体量子点（QD）和光学微腔模式实现腔-QED强耦合机制。这种耦合，尚未在任何实验室中实现，意味着单个光子可以强烈驱动QD，并且激发态QD的发射将确定性地发生，并且主要进入光场的单模。这种单量子水平的极端控制程度将使PI能够在量子信息处理中开发几个有用的应用：1。按需确定性地产生单光子（对于确保量子密码学的安全性有用）;2.将量子信息写入和阅读到材料系统中;3.根据需要确定性地产生偏振纠缠光子对（可用作量子通信或线性光学计算的资源）;4.量子信息处理或计算。近期目标是证明我们实验室已经构建的外腔系统将在QD和光学腔模式之间提供足够水平的相干耦合，以满足基于QD的量子信息处理（QIP）的要求。3年供资期内的第二个目标是上文第1和第2项。 如果量子技术真正可行，这项研究将有助于通信技术的潜在革命。这里的研究将有助于开发单光子和光子对的有效固态源，以及在量子计算系统中操纵电子和自旋态所需的单量子点的相干控制。量子信息科学很受学生欢迎-研究生和本科生。吸引学生参与研究。本科生，包括男性和女性，都参与了该项目。该项目还吸引了来自国外的访问科学家和学生，为学生提供了一种文化上的拓展体验。这些材料正在进入本科和研究生课程。PI最近发起并教授了一门本科非科学专业的新课程，名为互联网背后的物理学，他最近撰写了一本教科书。