在闭合时间路径温度场论基础上，导出了直接计算推迟和超前格林函数的一种费曼规则。
Based on the closed time path formalism, a deduced Feynman rule for directly calculating the retarded and advanced Green functions is given.
在闭合时间路径温度场论基础上，导出了直接计算推迟和超前格林函数的一种费曼规则。
Based on the closed time path formalism, a deduced Feynman rule for directly calculating the retarded and advanced Green functions is given.
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