A Simple Scheme for Directly Measuring the Wigner Functions of Cavity Fields
ZHANG Zhi-Ming
Department of Physics, Shanghai Jiao Tong University, Shanghai 200240
Max-Planck-Institute for Quantum Optics, Hans-Kopfermann-Str.1, D-85748 Garching, Germany
A Simple Scheme for Directly Measuring the Wigner Functions of Cavity Fields
ZHANG Zhi-Ming
Department of Physics, Shanghai Jiao Tong University, Shanghai 200240
Max-Planck-Institute for Quantum Optics, Hans-Kopfermann-Str.1, D-85748 Garching, Germany
关键词 ：
42.50.Dv ,
42.50.Ct ,
03.65.Ta ,
03.65.Wj
Abstract ： We propose a scheme for directly measuring the Wigner functions of cavity fields. The scheme is based on the Raman interaction between atoms and cavity fields. We find a simple and direct relation between the Wigner function and the atomic population difference. By suitably choosing the interaction time, we find that the Wigner function is just two times of the atomic population difference. Thus, one can obtain the Wigner function by measuring the atomic populations and calculating the population difference.
Key words ：
42.50.Dv
42.50.Ct
03.65.Ta
03.65.Wj
出版日期: 2003-02-01
:
42.50.Dv
(Quantum state engineering and measurements)
42.50.Ct
(Quantum description of interaction of light and matter; related experiments)
03.65.Ta
(Foundations of quantum mechanics; measurement theory)
03.65.Wj
(State reconstruction, quantum tomography)
引用本文:
ZHANG Zhi-Ming. A Simple Scheme for Directly Measuring the Wigner Functions of Cavity Fields[J]. 中国物理快报, 2003, 20(2): 227-229.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2003/V20/I2/227
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2003, Vol. 20 
