Quantum routing of single optical photons with a superconducting flux qubit

Keyu Xia, Fedor Jelezko, Jason Twamley

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)
22 Downloads (Pure)


Interconnecting optical photons with superconducting circuits is a challenging problem but essential for building long-range superconducting quantum networks. We propose a hybrid quantum interface between the microwave and optical domains where the propagation of a single-photon pulse along a nanowaveguide is controlled in a coherent way by tuning the electromagnetically induced transparency window with the quantum state of a flux qubit mediated by the spin in a nanodiamond. The qubit can route a single-photon pulse using the nanodiamond into a quantum superposition of paths without the aid of an optical cavity - simplifying the setup. By preparing the flux qubit in a superposition state our cavityless scheme creates a hybrid state-path entanglement between a flying single optical photon and a static superconducting qubit.

Original languageEnglish
Article number052315
Pages (from-to)1-11
Number of pages11
JournalPhysical Review A
Issue number5
Publication statusPublished - 14 May 2018

Bibliographical note

Copyright 2018 American Physical Society. Firstly published in Physical Review A, 97, 052315. The original publication is available at https://doi.org/10.1103/PhysRevA.97.052315. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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