2003/11/20 by Björn Hessmo, P. A. Usachev, Pavel Usachev +2 · 155 citations
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Fock space #Homodyne detection #Measure (data warehouse) #Optics #Photon #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum nonlocality #quant-ph
paper · pdf · doi:10.1103/physrevlett.92.180401
published in Physical Review Letters 92(18), 180401 (American Physical Society) · 4 pages, 3 figures, revtex4 format
arxiv created 2003/11/20 · openalex publication_date 2004/05/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this Letter we experimentally implement a single photon Bell test based on the ideas of S. Tan et al. [Phys. Rev. Lett. 66, 252 (1991)]] and L. Hardy [Phys. Rev. Lett. 73, 2279 (1994)]]. A double homodyne measurement is used to measure correlations in the Fock space spanned by zero and one photons. Local oscillators used in the correlation measurement are distributed to two observers by copropagating it in an orthogonal polarization mode. This method eliminates the need for interferometrical stability in the setup, consequently making it a robust and scalable method.