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本文建议一个自洽求解量子统计系统中序参量和费密型元激发及序参量集体激发的能谱、耗散和准粒子分布的联立方程组,并给出系统的圈图展开方法。这一理论方法既适用于平衡态,也适用于非平衡态。A set of coupled equations for a quantum statistical system that determine self-consis-tently the order parameter, the energy spectrum, the dissipation and the distribution for both fermion field and collective excitation is suggested with a loop expansion formalism. They are applicable to non-equilibrium as well as equilibrium systems.
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