Demonstration of quantum anti-Zeno effect with a single trapped ion  

作　　者：Man-Chao Zhang Wei Wu Lin-Ze He Yi Xie Chun-Wang Wu Quan Li Ping-Xing Chen 张满超;吴伟;何林泽;谢艺;吴春旺;黎全;陈平形(Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology;State Key Laboratory of High Performance Computing, National University of Defense Technology)

机构地区：[1]Department of Physics,College of Liberal Arts and Sciences,National University of Defense Technology,Changsha 410073,China [2]State Key Laboratory of High Pertbrmance Computing,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Physics B》2018年第9期191-196,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2016YFA0301903);the National Natural Science Foundation of China(Grant Nos.11174370,11304387,61632021,11305262,11574398,and N 61205108);the Research Plan Project of National University of Defense Technology,China(Grant No.ZK16-03-04)

摘　　要：We experimentally demonstrate the quantum anti-Zeno effect in a two-level system based on a single trapped ion ^（40）Ca~＋. In the large detuning regime, we show that the transfer from the ground state to the excited state can be remarkably enhanced by the inserted projection measurements. The inserted measurements in our experiment are realized by the electron shelving technique. Compared to the ideal projection measurement, which makes the quantum state collapse instantaneously, a practical electron shelving process needs a finite time duration. The minimum time for this collapse process is shown to be inversely proportional to the square of the coupling strength between the measurement laser and the system.We experimentally demonstrate the quantum anti-Zeno effect in a two-level system based on a single trapped ion ^（40）Ca~＋. In the large detuning regime, we show that the transfer from the ground state to the excited state can be remarkably enhanced by the inserted projection measurements. The inserted measurements in our experiment are realized by the electron shelving technique. Compared to the ideal projection measurement, which makes the quantum state collapse instantaneously, a practical electron shelving process needs a finite time duration. The minimum time for this collapse process is shown to be inversely proportional to the square of the coupling strength between the measurement laser and the system.

关 键 词：quantum anti-Zeno effect single trapped ion quantum measurement 

分 类 号：O413[理学—理论物理]