Non-Markovian discrete qubit dynamics

• Published in: Science bulletin (Beijing) Vol. 61; no. 13; pp. 1031 - 1036
• Main Authors: Sun, Jun, Sun, Yong-Nan, Li, Chuan-feng, Guo, Guang-Can, Luoma, Kimmo, Piilo, Jyrki
• Format: Journal Article
• Language: English
• Published: Beijing Elsevier B.V 01.07.2016; Science China Press
• Subjects: Chemistry/Food Science; Coherent optical effects; Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; multidisciplinary; Non-Markovian dynamics; Open quantum system; Physics; Quantum optics; Science; Science (multidisciplinary); 开放系统; 开放量子系统; 离散; 粒子动力学; 系统动力学; 量子信息处理; 量子控制; 马尔可夫; Quantum optics; Coherent optical effects; Non-Markovian dynamics; Open quantum system
• ISSN: 2095-9273; 2095-9281
• DOI: 10.1007/s11434-016-1089-8

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 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.