Density matrix and partition function for a generalized nondegenerate parametric amplifier gained via a type of two-mode special squeezed coherent state representation

摘要

By introducing a type of two-mode special squeezed coherent state, we directly derive the density matrix and partition function for a generalized nondegenerate parametric amplifier. The derivation is neat because the states make up a new, complete representation. [References: 10]