Density Matrix for Generalized Degenerate Parametric Amplifier in New Squeezed Coherent State Representation
Fan Hong‐Yi, Wang YiHua · Communications in Theoretical Physics · 1999
Based on the new type of single-mode squeezed coherent state , which differs from the conventional squeezed state in that its displacement parameter depends on its squeezing parameter, we calculate the partition functioa, free energy and density matrix for a generalized degenerate parametric amplifier.