New schemes for quantum state generation

The generation of quantum states of light has been one of the most discusse d topics in quantum optics. Nevertheless, quantum state generation is a dif ficult task that requires extreme control. Here, I am going to discuss thre e different schemes for the generation of pure quantum states. These scheme s rely upon the appropriate choice of atom-field interaction times, and non classical states are built up either from the vacuum state or from mixed st ates. (C) 2001 MAIK "Nauka/Interperiodica".