2008/07/01 by Ryo Namiki · 2 citations
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #quant-ph
paper · pdf · doi:10.1103/physreva.78.032333
published as Phys. Rev. A 78, 032333 (2008)
arxiv created 2008/07/01 · openalex publication_date 2008/09/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
If a quantum channel or process cannot be described by any measure-and-prepare scheme, we may say the channel is in the quantum domain (QD) since it can transmit quantum correlations. The concept of the QD clarifies the role of the quantum channel in quantum-information theory based on the local operation and classical communication (LOCC) paradigm: The quantum channel is useful only if it cannot be simulated by LOCC. We construct a simple scheme to verify that a given physical process or channel is in the QD by using two nonorthogonal states. We also consider its application for experiments such as the transmission or storage of quantum optical coherent states, single-photon polarization states, and squeezed vacuum states.