Optimal quantum cloning on a beam splitter.

نویسندگان

  • William T M Irvine
  • Antía Lamas Linares
  • Michiel J A de Dood
  • Dirk Bouwmeester
چکیده

We demonstrate how a beam splitter in combination with different light sources can be used as an optimal universal 1-->2 quantum cloner and as an optimal universal quantum NOT machine for the polarization qubit of a single photon. For the cloning a source of single photons with maximally mixed polarization is required and for the NOT operation a source of maximally entangled photon pairs. We demonstrate both operations with near optimal fidelity. Our scheme can be generalized in a natural way to clone and NOT the spin state of electrons.

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عنوان ژورنال:
  • Physical review letters

دوره 92 4  شماره 

صفحات  -

تاریخ انتشار 2004