Squeezed Coherent States and a Semiclassical Propagator for the   Schroedinger equation in Phase
  We construct semiclassical solutions of the symplectically covariant Schroedinger phase-space equation rigorously studied in a previous paper; we use for this purpose an adaptation of Littlejohn's nearby-orbit method. We take the opportunity to discuss in some detail the so fruitful notion of squeezed coherent state and the action of the metaplectic group on these states. 
Maurice de Gosson and Serge de Gosson