Method for Direct Measurement of the Wigner Function in Cavity QED and Ion Traps

作者：L. G. Lutterbach, L. Davidovich · 发表于：Physical Review Letters · 年份：1997 · DOI：10.1103/physrevlett.78.2547 · 被引用次数：391 · 研究领域：Quantum Information and Cryptography、Quantum Mechanics and Applications、Quantum optics and atomic interactions

We show that the Wigner function corresponding to an electromagnetic field in a cavity or a vibronic state of a trapped ion can be directly measured by means of a simple experimental procedure. The proposed method is insensitive to the relatively low detection efficiency in cavity QED experiments and yields a direct physical meaning to the Wigner distribution.