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Quantum information theory
Higher-order quantum operations and distributed quantum information processing
We consider that a quantum computer is not just a machine to run computational algorithms but also a machine to perform any operations allowed by quantum mechanics. We analyze what kinds of new properties and effects may appear in quantum systems by using quantum computers to improve our understanding of quantum mechanics from an operational point of view. We also investigate applications of quantum properties and effects such as entanglement for information processing, communication, quantum learning, and quantum manipulations by developing quantum algorithms and quantum protocols. Recently, we are analyzing non-locality, causal structures, parallelizability, and anonymity of quantum information processing and quantum programming by investigating higher-order quantum operations and distributed quantum computation.
quantum information, quantum algorithms, quantum entanglement, quantum computation, distributed quantum information processing, foundation of quantum mechanics