2005/10/13 by Fabio Sciarrino, F. Sciarrino, M. Ricci +6 · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Bloch sphere #Computer science #Control (management) #Control theory (sociology) #Disturbance (geology) #Fidelity #Mathematics #Measurement device #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum measurement #Quantum mechanics #Qubit #Realization (probability) #Weak measurement #quant-ph
paper · pdf · doi:10.1103/physrevlett.96.020408
published as Phys. Rev. Lett. 96, 020408 (2006) · 4 pages, 3 figures
arxiv created 2005/10/13 · openalex publication_date 2006/01/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We report the first experimental realization of an "optimal" quantum device able to perform a minimal disturbance measurement on polarization encoded qubits saturating the theoretical boundary established between the classical knowledge acquired of any input state, i.e., a "classical guess," and the fidelity of the same state after disturbance due to measurement. The device has been physically realized by means of a linear optical qubit manipulation, postselection measurement, and a classical feed-forward process.