Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Information Photonics

Broadband waveguide quantum memory for entangled photons

Erhan Sağlamyürek, Neil E. Sinclair, Jeongwan Jin, Joshua A. Slater, Daniel Oblak, Wolfgang Tittel, Félix Bussières, Mathew George, Raimund Ricken, W. Sohler

Published May 1, 2011• 30 citations
Publisher

Abstract

We report the reversible transfer of photon-photon entanglement, generated by means of spontaneous parametric down-conversion, into entanglement between a photon and a collective atomic excitation in a thulium-doped lithium niobate waveguide cooled to 3 K.
DOI
10.1109/ico-ip.2011.5953696

Related papers

Broadband waveguide quantum memory for entangled photons

Erhan Sağlamyürek, Neil E. Sinclair, Jeongwan Jin +7 more

We report the reversible transfer of photon-photon entanglement, generated by means of spontaneous parametric down-conversion, into entanglement between a photon and a collective atomic excitation in a thulium-doped lithium niobate waveguide cooled to 3 K.

IEEE/LEOS Summer Topical Meetings•Jul 1, 2011•1 citation

Broadband Waveguide Quantum Memory for Entangled Photons

Erhan Sağlamyürek, Neil E. Sinclair, Jeongwan Jin +7 more

For advanced applications in quantum information and communication the reversible transfer of quantum information between light and matter is essential. A key property of such a light-matter quantum interface is the faithful mapping of entanglement. We report the reversible transfer of photon-photon entanglement into entanglement between a photon and a collective atomic excitation in a thulium-doped lithium niobate waveguide. We use an Atomic Frequency Comb (AFC) memory protocol yielding a 5 GHz acceptance bandwidth of our memory. We reconstruct the bi-photon quantum state before and after the reversible transfer and asses the entanglement-preserving nature of our memory. We demonstrate a near perfect mapping of the entangled state. Additionally, we measure a violation of the CHSH Bell inequality before and after storage, thus directly verifying the sufficiency of the entanglement for quantum communication.

International Conference on Quantum Information•Jan 1, 2011•52 citations

How to Overcome the Distance Barrier in Quantum Communication: Quantum Repeaters and Quantum Memory

Wolfgang Tittel

I will introduce quantum repeaters and one of its key ingredients, the quantum memory, and discuss the reversible storage of entangled photons, created via spontaneous parametric down-conversion, in a thulium-doped lithium-niobate waveguide cooled to 3K.

Conference on Lasers and Electro-Optics•Jan 1, 2012•1 citation

Quantum Memory For Quantum Repeaters

Erhan Sağlamyürek, Neil E. Sinclair, Jeongwan Jin +7 more

The implementation of quantum memory, i.e. a quantum interface between light and matter, is central to advanced applications of quantum information processing and communication [1]. Notably, quantum memories are key ingredients in quantum repeaters [2], which promise extending quantum communication beyond its current distance limit. After a brief review of the working principle of a quantum repeater and the state-of-the-art of experimental investigations into quantum memory, we will present the reversible transfer of photon-photon entanglement into entanglement between a photon and an excitation in a thulium-doped lithium-niobate waveguide cooled to 3K. Our finding constitutes an important step towards quantum repeaters and fully quantum-enabled networks.

•Jan 1, 2011•0 citations

Quantum memory for quantum repeaters

Erhan Sağlamyürek, Neil E. Sinclair, Jeongwan Jin +7 more

The implementation of quantum memory, i.e. a quantum interface between light and matter, is central to advanced applications of quantum information processing and communication [1]. Notably, quantum memories are key ingredients in quantum repeaters [2], which promise extending quantum communication beyond its current distance limit. After a brief review of the working principle of a quantum repeater and the state-of-the-art of experimental investigations into quantum memory, we will present the reversible transfer of photon-photon entanglement into entanglement between a photon and an excitation in a thulium-doped lithium-niobate waveguide cooled to 3K. Our finding constitutes an important step towards quantum repeaters and fully quantum-enabled networks.

•Aug 1, 2011•5 citations

Direct Generation of Hybrid Modal - Polarization Entanglement in a Lithium Niobate Channel Waveguide

Divya Bharadwaj, Krishnan Thyagarajan

We propose a scheme for direct generation of photon pairs exhibiting hybrid entanglement between spatial mode and polarization degrees of freedom in a lithium niobate channel waveguide through a spontaneous parametric down conversion process.

International conference on fiber optics and photonics•Jan 1, 2016•0 citations
For advanced applications in quantum information and communication the reversible transfer of quantum information between light and matter is essential. A key property of such a light-matter quantum interface is the faithful mapping of entanglement. We report the reversible transfer of photon-photon entanglement into entanglement between a photon and a collective atomic excitation in a thulium-doped lithium niobate waveguide. We use an Atomic Frequency Comb (AFC) memory protocol yielding a 5 GHz acceptance bandwidth of our memory. We reconstruct the bi-photon quantum state before and after the reversible transfer and asses the entanglement-preserving nature of our memory. We demonstrate a near perfect mapping of the entangled state. Additionally, we measure a violation of the CHSH Bell inequality before and after storage, thus directly verifying the sufficiency of the entanglement for quantum communication.
The implementation of quantum memory, i.e. a quantum interface between light and matter, is central to advanced applications of quantum information processing and communication [1]. Notably, quantum memories are key ingredients in quantum repeaters [2], which promise extending quantum communication beyond its current distance limit. After a brief review of the working principle of a quantum repeater and the state-of-the-art of experimental investigations into quantum memory, we will present the reversible transfer of photon-photon entanglement into entanglement between a photon and an excitation in a thulium-doped lithium-niobate waveguide cooled to 3K. Our finding constitutes an important step towards quantum repeaters and fully quantum-enabled networks.
The implementation of quantum memory, i.e. a quantum interface between light and matter, is central to advanced applications of quantum information processing and communication [1]. Notably, quantum memories are key ingredients in quantum repeaters [2], which promise extending quantum communication beyond its current distance limit. After a brief review of the working principle of a quantum repeater and the state-of-the-art of experimental investigations into quantum memory, we will present the reversible transfer of photon-photon entanglement into entanglement between a photon and an excitation in a thulium-doped lithium-niobate waveguide cooled to 3K. Our finding constitutes an important step towards quantum repeaters and fully quantum-enabled networks.