Waveguide QED multichannel resonance and quantum routing 2013

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(第六十九期) Waveguide QED: multi-channel resonance and quantum routing 孙 昌 璞 院士 北京计算科学研究中心 2013年

(第六十九期) Waveguide QED: multi-channel resonance and quantum routing 孙 昌 璞 院士 北京计算科学研究中心 2013年 9月9日(星期一)上午10: 30 — 12: 00 频标楼四楼报告厅 主讲人简历: 理论物理学家。北京计算科学研究中心教 授。1992年于南开大学获理学博士学位。 2009年当选为中国科学院院士,2011 年当选 为发展中国家(第三世界)科学院院士。 主 要从事量子物理、数学物理和量子信息理论 的研究。最近他在 基于超导量子循环和纳米 机械共振固态系统的量子信息基础及其物理 实现方面取得一系列创新性研究成果。他已 在同行查阅的杂志发表论文260余篇,引用次 数 5800次,H因子 41。 Abstract: Waveguide QED describes the strong coupling between a two ( or more )-level system and E. M. field confined in a waveguide with some transverse field modes,which provide coherent transport of single photon with multichannels for quantum interference. There will emerge dramatic quantum optics effects, such as Fano-Feshbach resonance in guiding modes. Using the two-level system as an active controller, the waveguide QED system can behave as a single-photon device (quantum switch or single transistor) for quantum information processing and quantum network. In this talk, first I will give a brief review on the fundamental quantum physic of waveguide QED and the resonance characteristics of single photon scattering due to the existence of multichannel. I demonstrate the approaches of quantum field theory and scattering theory, developed recently by my group, to predict novel quantum resonance effects in the waveguide QED. I also show one of our most recent work on Quantum Routing of Single Photons based on waveguide QED , which will be published in PRL: A cyclic three-level atom embedded in quantum multi-channels composed of coupled-resonator waveguides can behave as an quantum router to extract a single photon fromthe incident channel, and then redirect it into another. 主办单位:武汉物数所理论与交叉研究部