报告题目：Coherent control and detection of quantum correlations in multimode light
报告人：Dr. Schlawin
主持人：康司坦丁·多尔夫曼 研究员
时间：2017.12.6 上午10:00
地点：理科大楼A814
报告人简介：
I completed my PhD at the University of Freiburg in Germany and the University of California at Irvine under the supervision of Prof. Andreas Buchleitner and Prof. Shaul Mukamel. In my dissertation, I worked on the use of entangled photons in nonlinear spectroscopy. Since 2015, I joined the group of Prof Dieter Jaksch at the University of Oxford, where I am working on driven many-body systems, and since 2017 I am a College Lecturer at Keble College.
报告内容简介：
The nonlinear interaction between light and matter on a single atom/molecule and few-photon level is of great fundamental and practical interest. In this talk, we theoretically investigate two facets of this active research field - the control of quantum correlations and new approaches to the detection of these. In the first part we will examine a fundamental problem in quantum optics: What is the optimal pulse form to drive a two-photon-transition? While optimal pulse forms for single-photon transitions have already been described, contradictory results have been published on two-photon transitions, and especially the possible role of photon entanglement. In formulating this question as a coherent control problem, we will show that - and quantify how much - the strong frequency quantum correlations of entangled photons enhance the transition compared to shaped classical pulses. In the second part of my talk, we will turn to the detection of photonic correlations. We will discuss how nonlinear spectroscopic signals can be understood as generalised photon counting experiments. More complex level structures may then reveal information on the incident light which cannot be obtained in conventional photon counting. In particular, Raman measurements are shown to provide a distinct new tool for the investigation of multimode quantum fields.
References
[1] F. Schlawin and A. Buchleitner, “Theory of coherent control with quantum light”, New J. Phys. 19, 013009 (2017).
[2] F. Schlawin, K. E. Dorfman and S. Mukamel, “Monitoring photon statistics and multimode field correlations via a Raman protocol”, submitted.