2009/09/16 by Jaromı́r Fiurášek, Jaromir Fiurasek, Michal Mičuda +1
Computer Science · Mathematics · Physics and Astronomy · #Computer science #Mathematics #Optics #Parametric statistics #Photon #Physics #Polarization (electrochemistry) #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum optics #Qubit #Spontaneous parametric down-conversion #Statistical physics #Statistics #quant-ph
paper · pdf · doi:10.1103/physreva.80.042312
published as Phys. Rev. A 80, 042312 (2009). · 8 pages, 6 figures, accepted for publication in Physical Review A
arxiv created 2009/09/16 · openalex publication_date 2009/10/16 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate optimal discrimination between two projective quantum measurements on a single qubit. We consider a scenario where the measurement that should be identified can be performed twice and we show that adaptive discrimination strategy, entangled probe states, and feed forward all help to increase the probability of correct identification of the measurement. We also experimentally demonstrate the studied discrimination strategies and test their performance. The employed experimental setup involves projective measurements on polarization states of single photons and preparation of required probe two-photon polarization states by the process of spontaneous parametric downconversion and passive linear optics.