Multi-Step Multi-Input One-Way Quantum Information Processing with Spatial and Temporal Modes of Light (Springer Theses)

In this thesis, the author develops for the first time an implementation methodology for arbitrary Gaussian operations using temporal-mode cluster states. The author also presents three experiments involving continuous-variable one-way quantum computations, where their non-classical nature is shown by observing entanglement at the outputs. The experimental basic structure of one-way quantum computation over two-mode input state is demonstrated by the controlled-Z gate and the optimum nonlocal gate experiments. Furthermore, the author proves that the operation can be controlled by the gain-tunable entangling gate experiment. Dr. Ukai Ryuji Department of Applied Physics, University of Tokyo ukai@alice.t.u-tokyo.ac.jp Introduction.- Quantum Optics.- Quantum States and Quantum State Manipulations.- Offline Scheme And One-Way Quantum Computation.- Cluster States And One-Way Quantum Computation.- Experimental Generation of Optical Continuous-Variable Cluster States.- Experimental Demonstration of Controlled-Z Gate for Continuous Variables.- Experimental Demonstration of Optimum Nonlocal Gate for Continuous Variables.- Experimental Demonstration of Gain-Tunable Entangling Gate for Continuous Variables.- Temporal-Mode Cluster States.- Summary.