Imprinting Complete Information about a Quantum Channel on its Output State

2002/11/20 by Giacomo Mauro D’Ariano, Giacomo Mauro D'Ariano, Paoloplacido Lo Presti · 6 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph

paper · pdf · doi:10.1103/physrevlett.91.047902

published as Phys. Rev. Lett. 91 047902-1 (2003) · revtex4, 4 pages, submitted to PRL

arxiv created 2002/11/20 · openalex publication_date 2003/07/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

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.

Citations

• Evolution of a twin beam in active optical media
• Completely positive linear maps on complex matrices

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