Comment on ``Creating Metastable Schroedinger Cat States''
  After a careful analysis of the feedback model recently proposed by Slosser and Milburn [Phys. Rev. Lett. 75, 418 (1995)], we are led to the conclusion that---under realistic conditions---their scheme is not significantly more effective in the production of linear superpositions of macroscopically distinguishable quantum states than the usual quantum-optical Kerr effect. 
Mauro Fortunato (Universitaet Ulm, Germany)