2010/02/28 by Ángel Rivas, ́Angel Rivas, Alfredo Luis
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1103/physrevlett.105.010403
published as Phys. Rev. Lett. 105, 010403 (2010) · 4 pages, 1 figure
openalex publication_date 2010/06/30 · arxiv created 2010/07/01 · arxiv updated 2010/07/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We examine whether metrological resolution beyond coherent states is a nonclassical effect. We show that this is true for linear detection schemes but false for nonlinear schemes, and propose a very simple experimental setup to test it. We find a nonclassicality criterion derived from quantum Fisher information.