Experimental demonstration of an efficient quantum phase-covariant cloning and its possible applications to simulating eavesdropping in quantum cryptography

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dc.creatorDu, Jiangfeng
dc.creatorDurt, Thomas
dc.creatorZou, Ping
dc.creatorKwek, L. C.
dc.creatorLai, C. H.
dc.creatorOh, C. H.
dc.creatorEkert, Artur
dc.date2003-11-04
dc.date.accessioned2026-07-07T06:08:14Z
dc.date.available2026-07-07T06:08:14Z
dc.descriptionWe describe a nuclear magnetic resonance (NMR) experiment which implements an efficient one-to-two qubit phase-covariant cloning machine(QPCCM). In the experiment we have achieved remarkably high fidelities of cloning, 0.848 and 0.844 respectively for the original and the blank qubit. This experimental value is close to the optimal theoretical value of 0.854. We have also demonstrated how to use our phase-covariant cloning machine for quantum simulations of bit by bit eavesdropping in the four-state quantum key distribution protocol.
dc.description4 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0311010
dc.identifierhttp://arxiv.org/abs/quant-ph/0311010
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91557
dc.subjectQuantum Physics
dc.titleExperimental demonstration of an efficient quantum phase-covariant cloning and its possible applications to simulating eavesdropping in quantum cryptography
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