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Quantum Algorithms for State Reconstruction

Eric Pedrol Ripoll

出版	Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona. Departament d'Òptica i Optometria, 2013 (Master in Photonics), 2013
URL	http://books.google.com.hk/books?id=KkUEywEACAAJ&hl=&source=gbs_api

註釋

[ANGLÈS] We review quantum state reconstruction schemes. We also present a quantum state preparation method by means of single-qubit operations and controlled not (C-NOT) gates. We aim at finding new quantum circuit schemes with an as low as possible number of universal quantum gates. A generalization process is carried out to link our method with a known reconstruction method. Such generalization is later used as a verification step for Plesch and Brukner in finding the minimum number of C-NOT gates necessary for a state preparation algorithm. Indeed, we demonstrate that Plesch and Brukner method turns out to be the best possible configuration, in terms of the number of CNOT gates, for a particular arrangement of unitary gates and controlled operations. Our algorithm, however, happens to have a lower computational depth.