theses/dissertations advising Quantum fluctuations and entanglement in the collective atomic recoil laser using a Bose-Einstein condensate Bistability in Free Electron Laser Three-mode treatment of a high gain steady-state free electron laser Superradiant self-similar pulses in the evolution of the electron beam-plasma instability Photon echo in the super-radiant light scattering from a Bose-Einstein condensate Tapering and self-tapering in a free electron laser amplifier Young's experiment, Schroedinger's spread and spontaneous intrinsic decoherence Atomic interaction effects in the superradiant light scattering from a Bose-Einstein condensate Chaotic and cooperative regimes for the micromaser Analogy between free electron lasers and Josephson junctions Classical and quantum description of the atomic motion in the superradiant light scattering from Bose-Einstein condensates A Landau-Ginzburg equation for a high gain free electron laser Microscopic gain mechanism in the high gain free electron laser Physics of the high gain free electron lasers The slowly varying envelope approximation revised Cooperative and chaotic transition of a free electron laser hamiltonian model Collective variable description of the Collective Atomic Laser Bistability in the radiation pressure on a two level atoms in a ring cavity Three-mode treatment of a high gain steady-state free electron laser Quantum effects in the collective light scattering by coherent atomic recoil in a Bose-Einstein condensate Recoil-induced effects in a bidirectional ring laser