Storage of hyperentanglement in a solid-state quantum memory

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Documents

  • Alexey Tiranov
  • Jonathan Lavoie
  • Alban Ferrier
  • Philippe Goldner
  • Varun B. Verma
  • Sae Woo Nam
  • Richard P. Mirin
  • Adriana E. Lita
  • Francesco Marsili
  • Harald Herrmann
  • Christine Silberhorn
  • Nicolas Gisin
  • Mikael Afzelius
  • Felix Bussieres
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.
Original languageEnglish
JournalOptica
Volume2
Issue number4
Pages (from-to)279-287
Number of pages9
ISSN2334-2536
DOIs
Publication statusPublished - 19 Dec 2014
Externally publishedYes

ID: 313514261