Non-Markovian discrete qubit dynamics  

作　　者：Jun Sun Yong-Nan Sun Chuan-Feng Li Guang-Can Guo Kimmo Luoma Jyrki Piilo 

机构地区：[1]Key Laboratory of Quantum Information, University of Scienceand Technology of China, Chinese Academy of Sciences,Hefei 230026, China [2]Synergetic Innovation Center of Quantum Information andQuantum Physics, University of Science and Technology of China, Hefei 230026, China [3]Institut fur Theoretische Physik, Technische Universitat Dresden, 01062 Dresden, Germany [4]Department of Physics and Astronomy, Turku Centre for Quantum Physics, University of Turku,20014 Turun Yliopisto, Finland

出　　处：《Science Bulletin》2016年第13期1031-1036,共6页科学通报（英文版）

基　　金：supported by the Magnus Ehrnrooth Foundation and Academy of Finland (287750);National Natural Science Foundation of China (61327901, 11274289 and 11325419);the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB01030300);C.F.L. and J.P. acknowledge financial support from the EU Collaborative project Qu Pro CS (Grant Agreement 641277)

摘　　要：The study of open quantum systems is important for fundamental issues of quantum physics as well as for technological applications such as quantum information processing. The interaction of a quantum system with its environment is usually detrimental for the quantum properties of the system and leads to decoherence. However,sometimes a quantum control can lead to a coherent partial exchange of information between the system and the dynamics of the open system might become non-Markovian. In this article, we study experimentally discrete nonMarkovian open quantum system dynamics. We implement a local control protocol using linear optics for controlling the information flow between the open system and the environment. We show how the transition from Markovian to non-Markovian dynamics can be controlled using only local operations for the open system.The study of open quantum systems is important for fundamental issues of quantum physics as well as for technological applications such as quantum information processing. The interaction of a quantum system with its environment is usually detrimental for the quantum prop- erties of the system and leads to decoherence. However, sometimes a quantum control can lead to a coherent partial exchange of information between the system and the dynamics of the open system might become non-Marko- vian. In this article, we study experimentally discrete non- Markovian open quantum system dynamics. We implement a local control protocol using linear optics for controlling the information flow between the open system and the environment. We show how the transition from Markovian to non-Markovian dynamics can be controlled using only local operations for the open system.

关 键 词：Non-Markovian dynamics Openquantum system Quantum optics Coherent opticaleffects 

分 类 号：O413[理学—理论物理]