中国物理B ›› 2018, Vol. 27 ›› Issue (9): 90305-090305.doi: 10.1088/1674-1056/27/9/090305

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

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

Man-Chao Zhang(张满超), Wei Wu(吴伟), Lin-Ze He(何林泽), Yi Xie(谢艺), Chun-Wang Wu(吴春旺), Quan Li(黎全), Ping-Xing Chen(陈平形)   

  1. 1 Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China;
    2 State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, China
  • 收稿日期:2018-05-22 修回日期:2018-06-19 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: Chun-Wang Wu, Ping-Xing Chen E-mail:cwwu@nudt.edu.cn;pxchen@nudt.edu.cn
  • 基金资助:

    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), and the Research Plan Project of National University of Defense Technology, China (Grant No. ZK16-03-04).

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

Man-Chao Zhang(张满超)1,2, Wei Wu(吴伟)1,2, Lin-Ze He(何林泽)1,2, Yi Xie(谢艺)1,2, Chun-Wang Wu(吴春旺)1,2, Quan Li(黎全)1,2, Ping-Xing Chen(陈平形)1,2   

  1. 1 Department of Physics, College of Liberal Arts and Sciences, National University of Defense Technology, Changsha 410073, China;
    2 State Key Laboratory of High Performance Computing, National University of Defense Technology, Changsha 410073, China
  • Received:2018-05-22 Revised:2018-06-19 Online:2018-09-05 Published:2018-09-05
  • Contact: Chun-Wang Wu, Ping-Xing Chen E-mail:cwwu@nudt.edu.cn;pxchen@nudt.edu.cn
  • Supported by:

    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), and the Research Plan Project of National University of Defense Technology, China (Grant No. ZK16-03-04).

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摘要：

We experimentally demonstrate the quantum anti-Zeno effect in a two-level system based on a single trapped ion 40Ca+. 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

Abstract:

We experimentally demonstrate the quantum anti-Zeno effect in a two-level system based on a single trapped ion 40Ca+. 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.

Key words: quantum anti-Zeno effect, single trapped ion, quantum measurement

中图分类号:  (Quantum algorithms, protocols, and simulations)

  • 03.67.Ac
32.80.Qk (Coherent control of atomic interactions with photons) 42.50.Ct (Quantum description of interaction of light and matter; related experiments)