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Telecom-Wavelength Atomic Quantum Memory in Optical Fiber for Heralded Polarization Qubits

Jeongwan Jin, Erhan Saglamyurek, Marcel. lí Grimau Puigibert, Varun Verma, Francesco Marsili, Sae Woo Nam, Daniel Oblak, and Wolfgang Tittel
Phys. Rev. Lett. 115, 140501 – Published 28 September 2015

Abstract

Polarization-encoded photons at telecommunication wavelengths provide a compelling platform for practical realizations of photonic quantum information technologies due to the ease of performing single qubit manipulations, the availability of polarization-entangled photon-pair sources, and the possibility of leveraging existing fiber-optic links for distributing qubits over long distances. An optical quantum memory compatible with this platform could serve as a building block for these technologies. Here we present the first experimental demonstration of an atomic quantum memory that directly allows for reversible mapping of quantum states encoded in the polarization degree of freedom of a telecom-wavelength photon. We show that heralded polarization qubits at a telecom wavelength are stored and retrieved with near-unity fidelity by implementing the atomic frequency comb protocol in an ensemble of erbium atoms doped into an optical fiber. Despite remaining limitations in our proof-of-principle demonstration such as small storage efficiency and storage time, our broadband light-matter interface reveals the potential for use in future quantum information processing.

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  • Received 10 June 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.140501

© 2015 American Physical Society

Authors & Affiliations

Jeongwan Jin1,*, Erhan Saglamyurek1, Marcel. lí Grimau Puigibert1, Varun Verma2, Francesco Marsili3, Sae Woo Nam2, Daniel Oblak1, and Wolfgang Tittel1,†

  • 1Institute for Quantum Science and Technology, and Department of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
  • 2National Institute of Standards and Technology, Boulder, Colorado 80305, USA
  • 3Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA

  • *Present address: Institute for Quantum Computing, Department of Physics and Astronomy, University of Waterloo, 200 University Ave West, Waterloo, Ontario, Canada.
  • wtittel@ucalgary.ca

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Vol. 115, Iss. 14 — 2 October 2015

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