Quantum Aspects of Optical Communications

Leading theoretical and applied groups give here a unique survey of quantum-optical communication and quantum measurements. In this important field of practically oriented research there is a close relation between foundations and their applications in technology.

Quantum limits of measurements and uncertainty principle.- A quantum experiment uncertainty principle: A general 2nd moment uncertainty relation.- Quantum mechanical description of light propagation.- Quantum propagation in optical fibres.- The uncertainty principle in a QND measurement of photon number.- Some remarks on the phase operator in quantum optics.- Quantum state control and nonlinear schr?dinger equation.- Quantum entropy and quantum measurements.- Information dynamics and its applications to optical communication processes.- Information theory and quantum correlations.- Physical information theory for 30 years: Basic concepts and results.- Quantum nondemolition measurement in optical communication theory.- Information in quantum optical communications.- Statistical inference for quantum processes.- A new class of quantum states: Examples and applications.- Continuous non-demolition observation quantum filtering and optimal estimation.- Entropy production and nonequilibrium stationarity in quantum dynamical systems.- Detection theory in quantum optics and quantum stochastic calculus.- Calculating photocount distributions by saddlepoint methods.- Rigorous derivation of error probability in coherent optical communication.- Comparison of ppam and ppm formats in photon counting channels.- Optical communication with coherent squeezed state. Realization of received quantum state control.- A new method for improving the bandwidth utilization efficiency in optical PPM.- Properties of system using spatial multi-mode squeezer.- Achievement of new quantum limit by switching of pump frequency of squeezer.- Information transmission with squeezed light.- Twin photons and squeezed light.- A new definition and generalization of squeezed states.- Squeezing of a filtered thermal field in a degenerated parametric optical amplifier.- Displaced number states.- Generalized quadratic generator of squeezed states.- Thermal states with variances smaller than vacuum variances.- Squeezing-symmetry of the balanced homodyne detector.- Optical communication with novel quantum devices.- Construction of modulator for quantum orthogonal signal by Bright Squeezer.- Efficiency of optical modulations with coherent state.- An optical system at the quantum limit of coherent detection: The wind lidar.- Simulation of optimum quantum receiver.- Gain, saturation and noise figure of a travelling wave semiconductor optical amplifier.- Oral presentation.