Imprinting complete information about a quantum channel on its output state.

نویسندگان

  • Giacomo Mauro D'Ariano
  • Paoloplacido Lo Presti
چکیده

We introduce a novel property of bipartite quantum states, which we call faithfulness, and we say that a state is faithful when acting with a channel on one of the two quantum systems; the output state carries complete information about the channel. The concept of faithfulness can also be extended to sets of states, when the output states altogether carry a complete imprinting of the channel. Measures of degrees of faithfulness are proposed.

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عنوان ژورنال:
  • Physical review letters

دوره 91 4  شماره 

صفحات  -

تاریخ انتشار 2003