摘要
With the help of technique of integration within an ordered product of operators we can fully display the partial trace method to deduce some new density operators of light field. The general form of single-mode density operator is derived in this way from a normalized two-mode generalized squeezed pure state density operator.
基金
Supported by the President Foundation of Chinese Academy of Science and National Natural Science Foundation of China under Grant Nos.10775097 and 10874174
