Thermalization of Squeezed States
  Starting with a thermal squeezed state defined as a conventional thermal state based on an appropriate hamiltonian, we show how an important physical property, the signal-to-noise ratio, is degraded, and propose a simple model of thermalization (Kraus thermalization). 
Allan I. Solomon (The Open University, U.K. and LPTMC, University of   Paris VI, Paris, France)