光物理系列学术报告（九十八） | 中国科学院光物理重点实验室

题目：Quantum Electrodynamics in Lineland

报告人：Prof. Barry Sanders（Institute for Quantum Science and Technology, Department of Physics and Astronomy, University of Calgary, Canada）

摘要：

Quantum electrodynamic phenomena, such as spontaneous emission from an atom or coupling between two dipoles, sensitively depend on the dimension of the surrounding space. The intrigue of dimensional dependence is whimsically related in Abbott’s story about a Square living in two-dimensional Flatland [1]. The Square tries to comprehend three-dimensional Spaceland from a visiting Sphere, and, in a separate tale, the Square tries to explain the second dimension to the Points inhabiting one-dimensional Lineland.

Superconducting circuits with inbuilt artificial atoms, based on using Josephson junctions to realize nonlinear oscillators with quantized energy levels, enable us to realize Quantum Electrodynamics in Lineland. Lineland turns out to be a technological wonderland, with easy access to strong dipole coupling, excellent mode matching and non-abating dipole-dipole coupling over long distances. In particular we explore coherent and collective effects of artificial atoms in Lineland and their technological implications [2-5].

[1] Edwin Abbott Abbott, Flatland: A Romance of Many Dimensions (1884).

[2] J. Joo, J. Bourassa, A. Blais and B. C. Sanders, Electromagnetically-induced transparency with amplification in superconducting circuits, Physical Review Letters 105(7): 073601 (2010).

[3] P. M. Leung and B. C. Sanders, Coherent control of microwave pulse storage in superconducting circuits , Physical Review Letters 109(25): 253603 (2012).

[4] K. Lalumière, B. C. Sanders, A. F. Van Loo, A. Fedorov, A. Wallraff and A. Blais, Input-output theory for waveguide QED with an ensemble of inhomogeneous atoms, Physical Review A 88(4): 043806 (2013).

[5] A. F. Van Loo, A. Fedorov, K. Lalumière, B. C. Sanders, A. Blais and A. Wallraff, , Science 342(6165), 1494-1496 (2013).Photon-mediated interactions between distant artificial atoms

简介：

Prof. Barry Sanders received his Bachelor of Science degree from the University of Calgary in 1984 and completed a PhD in 1987 at Imperial College supervised by Professor Sir Peter Knight. He was a postdoctoral researcher at the Australian National University, the University of Queensland and the University of Waikato and then joined the Physics Department at Macquarie University in 1991 before joining the Department of Physics and Astronomy at the University of Calgary in 2003. Sanders is especially well known for his seminal contributions to theories of quantum-limited measurement, highly nonclassical light, practical quantum cryptography and optical implementations of quantum information tasks. His current research interests include quantum resources and algorithms, optical and atomic implementations of quantum information tasks and protocols, quantum processes in biological systems, and machine-learning for quantum control. He is a Fellow of the Institute of Physics (U.K.), the Optical Society of America, the Australian Institute of Physics, the American Physical Society, and the Canadian Institute for Advanced Research. He is a past president of the Australian Optical Society, past Founding Co-Chair of the Canadian Association of Physicists Division of Atomic, Molecular and Optical Physics and former leader of the Optical Society of America Quantum Optical Science and Technology Technical Group. Sanders is an associate editor of Physical Review A, a former editor of Optics Communications and former North American editor of the New Journal of Physics.

时间：2014年8月22日下午15：00

地点：中科院物理研究所M236会议室

联系人：金奎娟研究员（Tel：82648099）

主办单位：中国科学院光物理重点实验室