Waveguide Quantum Electrodynamics with Artificial Atoms

ORAL  · Invited

Abstract

The strong-coupling regime of atom-photon interactions, in which a single atom and single photon can coherently exchange an excitation, is a common target for quantum optics and quantum information platforms. This is now readily achieved in cavity Quantum Electrodynamics (QED) by confining real or artificial atoms within the modes of cavities. There is a complementary paradigm, dubbed waveguide QED, where instead atoms couple to itinerant photons propagating in waveguides. The small mode volume of the waveguide can enable the strong-coupling regime even without cavity enhancement. In this talk, we discuss waveguide QED experiments using superconducting artificial atoms coupled to microwave coplanar waveguides, and we demonstrate the deterministic emission of a photon into a chosen direction. This scheme is a potential building block for remote entanglement or quantum communication protocols, and we will present experimental progress towards those goals.

*This research was funded in part by the Army Research Office under grants W911NF-18-1-0411 and W911NF-23-1-0045, the AWS Center for Quantum Computing, the DOE Office of Science National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA) under contract no. DE-SC0012704, and the Department of Defense under Air Force contract no. FA8702-15-D-0001. A.A. acknowledges support from the Clare Boothe Luce Graduate Fellowship. B.S.Y. acknowledges support from the Hertz Fellowship and National Science Foundation Fellowship. Any opinions, findings, conclusions or recommendations expressed in this material are those of the author(s) and should not be interpreted as necessarily representing the official policies or endorsements of the US Government.

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Publication: Kannan, B., Almanakly, A., Sung, Y. et al. On-demand directional microwave photon emission using waveguide quantum electrodynamics. Nat. Phys. 19, 394–400 (2023). https://doi.org/10.1038/s41567-022-01869-5

Presenters

  • Jeffrey A Grover

    • Massachusetts Institute of Technology

Authors

  • Jeffrey A Grover

    • Massachusetts Institute of Technology

  • Aziza Almanakly

    • Massachusetts Institute of Technology

  • Beatriz S Yankelevich

    • Massachusetts Institute of Technology

  • Bharath Kannan

    • Massachusetts Institute of Technology MI

  • Agustin Di Paolo

    • Massachusetts Institute of Technology

  • Réouven Assouly

    • Massachussets Institute of Technology

  • Max Hays

    • MIT

  • Bethany M Niedzielski

    • MIT Lincoln Lab

  • Kyle Serniak

    • MIT Lincoln Laboratory

  • Mollie E Schwartz

    • MIT Lincoln Laboratory

  • Jonilyn L Yoder

    • MIT Lincoln Lab

  • Joel I Wang

    • Massachusetts Institute of Technology MI

  • Terry P Orlando

    • Massachusetts Institute of Technology MIT

  • Simon Gustavsson

    • Massachusetts Institute of Technology MIT

  • William D Oliver

    • Massachusetts Institute of Technology MI