光物理系列学术报告（第154期） | 中国科学院光物理重点实验室

题目：Field-Intensity Correlations of Light

报告人：Professor Luis A. Orozco

Joint Quantum Institute, Department of Physics, University of Maryland and NIST

摘要：

The nature of light is a topic that has animated discussions in physics since the time ofIsaac Newton. The argument of wave versus particle is resolved in quantumelectrodynamics by a formalism that combines both of these aspects. The formalism isfundamentally statistical, and as with quantum phenomena in general, it is through thestatistical uncertainty, fluctuations, that the wave and particle natures of light sit self-consistentlyside by side. Two lines of experiments have been followed: those measuringthe particle aspect of light (correlations between pairs of photons detected using theHanbury Brown and Twiss technique), and those studying the wave aspect of light(squeezing experiments that measure the fluctuation variance of the wave amplitude). Noattempt has previously been made to draw on the particle and wave aspects together bycorrelating a photon detection with fluctuations of the electromagnetic wave amplitude.

I will present the formalism of the field-intensity correlation, third order on the field, andshow how we have managed to measure this correlation, using as a source a cavity QEDsystem. The source is known to emit nonclassical light; this has been demonstrated inboth photon correlation and squeezing measurements. We now have a way to observe thefluctuation of the wave amplitude of light underlying these measurements by exploitingthe conditioning on a photon detection to catch it as it occurs. This correlation function inits relations to the field (wave) – intensity (particle) opens interesting possibilities inquantum information and quantum feedback.

简介：

Luis A. Orozco completed a BS in engineering in Guadalajara, Mexico, obtained his PhD in physics at the University of Texas at Austin in 1987, then was a postdoc at Harvard University, working at CERN in Switzerland. From 1991 to 2003 he was a professor of physics in the State University of New York at Stony Brook, and from 2003 has been a professor at the University of Maryland in College Park, where he is Co-Director of the Physics Frontier Center of the Joint Quantum Institute. He has been elected a Guggenheim Fellow (1998), Fellow of APS (2000), Fellow of OSA (2003), Fellow of IoP, UK (2005), Distinguished Traveling Lecturer of APS (2002-2017), and corresponding member of the Academia Mexicana de Ciencias (2005). He has an Honoris Causa Doctorate from INAOE, Mexico (2016). He has graduated 23 PhD students and more than 60 undergraduates have worked in his group, with whom he has published more than 100 papers on quantum optics, quantum information, fundamental symmetry tests, and high precision spectroscopy.

时间：2018年1月18日（星期四）下午14:30

地点：中科院物理研究所M253会议室

邀请人：吴令安研究员（Tel：82649334）

联系人：陆凌研究员（Tel：82649203）

主办单位：中国科学院光物理重点实验室