(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