Evolution of the single-mode squeezed vacuum state in amplitude   dissipative channel
  Using the way of deriving infinitive sum representation of density operator as a solution to the master equation describing the amplitude dissipative channel by virtue of the entangled state representation, we show manifestly how the initial density operator of a single-mode squeezed vacuum state evolves into a definite mixed state which turns out to be a squeezed chaotic state with decreasing-squeezing. We investigate average photon number, photon statistics distributions for this state. 
Hong-Yi Fan, Shuai Wang and Li-Yun Hu
quant-ph