2003/09/30 by Hugues de Riedmatten, Ivan Marcikic, I. Marcikic +4 · 4 citations
Mathematics · Physics and Astronomy · #Advanced Fiber Laser Technologies #Computer science #Dimension (graph theory) #Interference (communication) #Laser #Laser-Matter Interactions and Applications #Mathematics #Optics #Orbital Angular Momentum in Optics #Parametric statistics #Phase (matter) #Photon #Photonics #Physics #Quantum #Quantum entanglement #Quantum mechanics #Spontaneous parametric down-conversion #Superposition principle #Telecommunications #Visibility #quant-ph
paper · pdf · doi:10.1103/physreva.69.050304
published as Phys. Rev. A 69, 050304 (2004) · 4 pages, 4 figures, published version
openalex publication_date 2004/05/18 · arxiv created 2004/09/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present an experiment where two photonic systems of arbitrary dimensions can be entangled. The method is based on spontaneous parametric down-conversion with trains of d pump pulses with a fixed phase relation, generated by a mode-locked laser. This leads to a photon pair created in a coherent superposition of d discrete emission times, given by the successive laser pulses. Entanglement is shown by performing a two-photon interference experiment and by observing the visibility of the interference fringes increasing as a function of the dimension d. Factors limiting the visibility, such as the presence of multiple pairs in one train, are discussed.