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The 322nd forum: Cavity Quantum Electrodynamics, a platform for studies of quantum thermodynamics: quantum velocity assisted by the reservoir.

Date: 2018-01-17
Time: 15:00
Venue: 中科院物理研究所M楼236报告厅
Speaker: Professor Luis A. Orozco

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

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.

Cavity quantum electrodynamics (CQED) involves an open quantum system with dynamics that lends to detailed studies. We measure the quantum velocity of the evolution of the electric field state in a weakly excited CQED system that consists of a single optical cavity mode and a collection of atoms. In the intermediate CQED regime the atom dipole-coupling rate to the cavity mode is comparable to the cavity decay rate and the atomic spontaneous emission rate.

We consider the mode of the electromagnetic field as the quantum system of interest, with a preferential coupling to a tunable environment: the atoms. By changing the number of atoms coupled to the cavity mode, we accelerate the speed to reach the steady state: the quantum speed of the repopulation of states in the cavity increases with the coupling between the cavity mode and the non-Markovian reservoir (the number of atoms). We find a non-linear relationship between quantum velocity and the number of atoms in the system. This talk will introduce the platform and the quantum correlations to characterize it, and show both the theory and the experiment.

邀 请 人:吴令安(电话:82649334)
联 系 人:李园园(电话:82649364)