2014/12/31 by Alexey Tiranov, Jonathan Lavoie, Alban Ferrier +12 · 3 citations
Computer Science · Physics and Astronomy · #Photon #Photon entanglement #Photonics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum entanglement #Quantum information #Quantum information science #Quantum network #Quantum optics and atomic interactions #Quantum sensor #Quantum technology #quant-ph
paper · pdf · doi:10.1364/optica.2.000279
published as Optica, 2, 279--287 (2015)
arxiv created 2015/02/27 · openalex publication_date 2015/03/25 · arxiv updated 2015/03/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
Two photons can simultaneously share entanglement between several degrees of freedom such as polarization, energy-time, spatial mode and orbital angular momentum. This resource is known as hyperentanglement, and it has been shown to be an important tool for optical quantum information processing. Here we demonstrate the quantum storage and retrieval of photonic hyperentanglement in a solid-state quantum memory. A pair of photons entangled in polarization and energy-time is generated such that one photon is stored in the quantum memory, while the other photon has a telecommunication wavelength suitable for transmission in optical fibre. We measured violations of a Clauser-Horne-Shimony-Holt (CHSH) Bell inequality for each degree of freedom, independently of the other one, which proves the successful storage and retrieval of the two bits of entanglement shared by the photons. Our scheme is compatible with long-distance quantum communication in optical fibre, and is in particular suitable for linear-optical entanglement purification for quantum repeaters.