2007/06/30 by Bing He, János A. Bergou, Janos A. Bergou +1 · 4 citations
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Neural Networks and Reservoir Computing #Quantum Information and Cryptography #quant-ph
paper · pdf · doi:10.1103/physreva.76.032301
published as Phys. Rev. A 76, 032301 (2007) · accepted publication version in PRA
arxiv created 2007/08/14 · openalex publication_date 2007/09/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We propose an experimental setup that is capable of unambiguously discriminating any pair of linearly independent single photon polarization qubits, about which we do not have any knowledge except that an extra pair of these unknown states are provided as the reference. This setup, which is constructed with optical controlled-NOT (CNOT) gates, weak cross Kerr nonlinearities, Bell state analyzers, and other linear optical elements, transforms the unknown triple photon input states to the corresponding single photon states to be deterministically processed by a linear optics circuit. The optimal discrimination of the unknown states is achieved by this setup.