N-Level System Interacting with Single Radiation Mode and Multi Cat   States of Schrodinger in the Strong Coupling Regime
  In this paper we consider some (generalized) models which deal with n--level atom interacting with a single radiation mode and study a general structure of Rabi floppings of these generalized ones in the strong coupling regime.   To solve these models we introduce multi cat states of Schr{\" o}dinger in our terminology and extend the result in (quant--ph/0203135) which Rabi frequencies are given by matrix elements of generalized coherent operators (quant--ph/0202081) under the rotating--wave approximation. Our work is a full generalization of Frasca (quant--ph/0111134) and Fujii (quant--ph/0203135).   In last we make a brief comment on an application to Quantum Computation on the space of qudits. 
Kazuyuki Fujii (Yokohama City Univ.)