Optomechanical interface between telecom photons and spin quantum memory

Quantum networks enable a broad range of practical and fundamental applications spanning from distributed quantum computing to sensing and metrology. A cornerstone of such networks is an interface between telecom photons and quantum memories, which has proven challenging for the case of spin-mechani...

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Bibliographic Details
Published in:Nature physics 2021-12, Vol.17 (12), p.1420-1425
Main Authors: Shandilya, Prasoon K., Lake, David P., Mitchell, Matthew J., Sukachev, Denis D., Barclay, Paul E.
Format: Article
Language:English
Subjects:
Data processing
Diamonds
Frequency ranges
Interfaces
Lasers
Magnetic fields
Networks
Optics
Opto-mechanics
Photons
Quantum computing
Quantum phenomena
Qubits (quantum computing)
Room temperature
Telecommunications
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Summary:Quantum networks enable a broad range of practical and fundamental applications spanning from distributed quantum computing to sensing and metrology. A cornerstone of such networks is an interface between telecom photons and quantum memories, which has proven challenging for the case of spin-mechanical memories. Here we demonstrate a novel approach based on cavity optomechanics that utilizes the susceptibility of spin qubits to strain. We use it to control electronic spins of nitrogen vacancy centres in diamond with photons in the 1,550 nm telecommunication wavelength band. This method does not involve qubit optical transitions and is insensitive to spectral diffusion. Furthermore, our approach can be applied to solid-state qubits in a wide variety of materials, expanding the toolbox for quantum information processing.Quantum networks require a connection between quantum memories and optical links, which often operate in different frequency ranges. An optomechanical device exploiting the strain dependence of a colour-centre spin provides such a spin–optics interface at room temperature.
ISSN:1745-2473
1745-2481
DOI:10.1038/s41567-021-01364-3