Time Entanglement between a Photon and a Spin Wave in a Multimode Solid-State Quantum Memory

Physical Review Letters
Kutlu KutluerHugues de Riedmatten

Abstract

The generation and distribution of entanglement are key resources in quantum repeater schemes. Temporally multiplexed systems offer time-bin encoding of quantum information which provides robustness against decoherence in fibers, crucial in long distance communication. Here, we demonstrate the direct generation of entanglement in time between a photon and a collective spin excitation in a rare earth ion doped ensemble. We analyze the entanglement by mapping the atomic excitation onto a photonic qubit and by using time-bin qubit analyzers implemented with another doped crystal using the atomic frequency comb technique. Our results provide a solid-state source of entangled photons with embedded quantum memory. Moreover, the quality of the entanglement is high enough to enable a violation of a Bell inequality by more than two standard deviations.

References

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Aug 7, 2007·Physical Review Letters·Christoph SimonNicolas Gisin
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Jun 26, 2010·Nature·Morgan P HedgesMatthew J Sellars
Jan 14, 2011·Nature·Christoph ClausenNicolas Gisin
Jan 14, 2011·Nature·Erhan SaglamyurekWolfgang Tittel
Sep 26, 2012·Physical Review Letters·Patrick M LedinghamJevon J Longdell
Jul 22, 2015·Physical Review Letters·Mustafa GündoğanHugues de Riedmatten
Feb 25, 2017·Physical Review Letters·Radosław ChrapkiewiczWojciech Wasilewski
Jun 10, 2017·Physical Review Letters·Kutlu KutluerHugues de Riedmatten
Jun 10, 2017·Physical Review Letters·Cyril LaplaneMikael Afzelius
Nov 24, 2017·Nature·Nicolas MaringHugues de Riedmatten
Mar 24, 2018·Physical Review Letters·Pau FarreraHugues de Riedmatten

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Citations

Sep 26, 2020·Physical Review Letters·P CasparR T Thew
Apr 10, 2020·Nature·Jonathan M KindemAndrei Faraon
Aug 17, 2020·Nature Communications·Daniel CanoKlaas-Jan Tielrooij
Oct 8, 2020·Scientific Reports·Abdel-Haleem Abdel-AtyHichem Eleuch
Apr 24, 2021·Nature Communications·Yu MaGuang-Can Guo
Jun 4, 2021·Nature·Dario Lago-RiveraHugues de Riedmatten

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