腔量子电动力学中环境辅助的场演化加速

Environment-Assisted Speed-up of the Field Evolution in Cavity Quantum Electrodynamics.

作者信息

Cimmarusti A D, Yan Z, Patterson B D, Corcos L P, Orozco L A, Deffner S

机构信息

Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA.

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China.

出版信息

Phys Rev Lett. 2015 Jun 12;114(23):233602. doi: 10.1103/PhysRevLett.114.233602. Epub 2015 Jun 11.

DOI:10.1103/PhysRevLett.114.233602

PMID:26196802

Abstract

We measure the quantum speed of the state evolution of the field in a weakly driven optical cavity QED system. To this end, the mode of the electromagnetic field is considered as a quantum system of interest with a preferential coupling to a tunable environment: the atoms. By controlling the environment, i.e., changing the number of atoms coupled to the optical cavity mode, an environment-assisted speed-up is realized: the quantum speed of the state repopulation in the optical cavity increases with the coupling strength between the optical cavity mode and this non-Markovian environment (the number of atoms).

摘要

我们测量了弱驱动光学腔量子电动力学系统中场态演化的量子速度。为此，将电磁场的模式视为一个感兴趣的量子系统，它与一个可调谐环境（原子）存在优先耦合。通过控制环境，即改变与光学腔模式耦合的原子数量，实现了环境辅助加速：光学腔中态再填充的量子速度随着光学腔模式与这种非马尔可夫环境（原子数量）之间的耦合强度增加而增加。