Improved light-matter interaction for storage of quantum states of light in a thulium-doped crystal cavity

Journal article (2020)

Authors

J.H. Davidson Kavli institute of nanoscience Delft, QuTech Advanced Research Centre, University of Calgary, QID/Tittel Lab - QuTech Advanced Research Centre
P. Lefebvre University of Calgary
Jun Zhang University of Calgary
Daniel Oblak University of Calgary
W. Tittel QID/Tittel Lab - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft, QuTech Advanced Research Centre, Quantum Communications Lab - EEMCS
Research Group
QID/Tittel Lab (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2020 J.H. Davidson, Pascal Lefebvre, Jun Zhang, Daniel Oblak, W. Tittel
DOI
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https://doi.org/10.1103/PhysRevA.101.042333
More Info
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Published Date

2020

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Internet Division

Research Group

QID/Tittel Lab

Abstract

We design and implement an atomic frequency comb quantum memory for 793-nm wavelength photons using a monolithic cavity based on a thulium- (Tm-) doped Y3Al5O12 crystal. Approximate impedance matching results in the absorption of 90% of input photons and a memory efficiency of (27.5±2.7)% over a 500-MHz bandwidth. The cavity enhancement leads to a significant improvement over the previous efficiency in Tm-doped crystals using a quantum memory protocol. In turn, this allows us to store and recall quantum states of light in such a memory. Our results demonstrate progress toward efficient and faithful storage of single-photon qubits with a large time-bandwidth product and multimode capacity for quantum networking.