题 目：Quantum Technology of Light as a Harmonic Oscillator（量子科技：光谐振子的研究）
时 间：2015年4月15日（周三）上午10:20
地 点：沙河校区通信楼818室
主讲人简介:
Alexander Lvovsky is an experimental physicist. He was born and raised in Moscow and did his undergraduate in Physics at the Moscow Institute of Physics and Technology. In 1993, he became a graduate student in Physics at Columbia University in New York City. His thesis research, conducted under the supervision of Dr. Sven R. Hartmann, was in the field of coherent optical transients in atomic gases. After completing his Ph. D. in 1998, he spent a year at the University of California, Berkeley as a postdoctoral fellow in the Department of Physics, and then five years at Universit?t Konstanz in Germany, first as an Alexander von Humboldt postdoctoral fellow, then as a research group leader in quantum-optical information technology. In 2004 he became Professor in the Department of Physics and Astronomy at the University of Calgary, where he remains today. Alexander is a past Canada Research Chair, a lifetime member of the American Physical Society, a Fellow of the Optical Society of America and a winner of many awards–most notably the International Quantum Communications award, the Alberta Ingenuity New Faculty award and the Emmy Noether research award of the German Science Foundation. At the University of Calgary, Alexander conducts wide-profile experimental and theoretical research on synthesis, manipulation, measurement and storage of quantum optical information for applications in quantum technology.
内容提要：
Although the quantum nature of light has been discovered over a century ago, controlling its quantum states still presents a considerable technical challenge. The past fifteen years have shown significant progress in solving it. Using entangled light sources, linear optical transformations and conditional measurements, we are able to produce and measure increasingly complex quantum optical states. Prof. Alexander Lvovsky will review some of the new states of light that have been studied in the past years, methods of their preparation and measurement. He will show how one can use the same basic nonclassical state – the two-mode squeezed state prepared through parametric down-conversion – to prepare a great variety of complex optical states – ranging from photon number states and their superpositions to micro-macro entangled “Schr?dinger cats” containing millions of photons.
