Por favor, use este identificador para citar o enlazar este ítem: https://hdl.handle.net/20.500.12104/42711
Título: Measurement-driven quantum evolution
Autor: Roa, L.
Delgado, A.
Ladron De Guevara, M.L.
Klimov, Andrei B.
Fecha de publicación: 2006
Resumen: We study the problem of mapping an unknown mixed quantum state onto a known pure state without the use of unitary transformations. This is achieved with the help of sequential measurements of two noncommuting observables only. We show that the overall success probability is maximized in the case of measuring two observables whose eigenstates define mutually unbiased bases. We find that for this optimal case the success probability quickly converges to unity as the number of measurement processes increases and that it is almost independent of the initial state. In particular, we show that to guarantee a success probability close to one the number of consecutive measurements must be larger than the dimension of the Hilbert space. We connect these results to quantum copying, quantum deleting, and entanglement generation. 2006 The American Physical Society.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-33144480269&partnerID=40&md5=f80b2701c714607fdabce063d55bdf8c
http://hdl.handle.net/20.500.12104/42711
Aparece en las colecciones:Producción científica UdeG

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