2006/08/31 by Alexei Ourjoumtsev, Aurelien Dantan, Aurélien Dantan +2 · 7 citations
Computer Science · Mathematics · Physics and Astronomy · #Coherent states #Delocalized electron #Gaussian #Mathematics #Parametric statistics #Photon #Photon entanglement #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Spontaneous parametric down-conversion #Statistical physics #Statistics #Subtraction #quant-ph
paper · pdf · doi:10.1103/physrevlett.98.030502
published as Physical review letters 98 (2007) 030502
openalex publication_date 2007/01/17 · arxiv created 2007/01/30 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We experimentally demonstrate that the entanglement between Gaussian entangled states can be increased by non-Gaussian operations. Coherent subtraction of single photons from Gaussian quadrature-entangled light pulses, created by a nondegenerate parametric amplifier, produces delocalized states with negative Wigner functions and complex structures more entangled than the initial states in terms of negativity. The experimental results are in very good agreement with the theoretical predictions.