Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Z47: Superconducting Qubits: Waveguide QED, Cats, and More
11:30 AM–2:30 PM,
Friday, March 8, 2024
Room: 200CD
Sponsoring
Unit:
DQI
Chair: Ariadna Soro, Chalmers University of Technology
Abstract: Z47.00002 : Deterministic Bidirectional Remote Entanglement with Waveguide Quantum Electrodynamics (Part 1)*
11:42 AM–11:54 AM
Presenter:
Beatriz S Yankelevich
(Massachusetts Institute of Technology)
Authors:
Beatriz S Yankelevich
(Massachusetts Institute of Technology)
Aziza Almanakly
(Massachusetts Institute of Technology)
Bharath Kannan
(Massachusetts Institute of Technology MI)
Max Hays
(MIT)
Agustin Di Paolo
(MIT)
Alex Greene
(MIT)
Michael A Gingras
(MIT Lincoln Laboratory)
Bethany M Niedzielski
(MIT Lincoln Lab)
Hannah Stickler
(MIT Lincoln Laboratory)
Kyle Serniak
(MIT Lincoln Laboratory & MIT RLE)
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)
Jeffrey A Grover
(Massachusetts Institute of Technology)
William D Oliver
(Massachusetts Institute of Technology MI)
tensible networks of quantum processors. Quantum information transfer between arbitrary nodes is generally mediated either by photons that propagate between them or by resonant couplers. The utility is determined by the type of emitter, propagation channel, and receiver. Existing approaches involving propagating microwave photons have limited fidelity due to photon loss and are often unidirectional, whereas architectures that use direct resonant coupling are bidirectional in principle, but can generally accommodate only a few local nodes. In this work, we develop a quantum interconnect comprising an emitter, receiver, and propagation channel that circumvent these issues [1]. We have demonstrated high-fidelity directional microwave photon emission using an artificial molecule comprising two superconducting qubits strongly coupled to a bidirectional waveguide [2]. Quantum interference between the photon emission pathways from the molecule generates single photons that selectively propagate in a chosen direction. After emitting time-symmetric, directional photons from one module, we absorb those itinerant microwave photons with another identical module tiled along the same waveguide. We extend the absorption protocol to demonstrate remote entanglement, a key resource for an extensible quantum network. Part 1 introduces the protocol and describes our platform from the perspective of chiral waveguide QED.
[1] Gheeraert, N. et al. Phys. Rev. A 102, 053720 (2020)
[2] Kannan, B., Almanakly, et al. Nat. Phys. 19, 394–400 (2023).
*This research was funded in part by the Army Research Office under Award No. W911NF-23-1-0045 and by the Under Secretary of Defense for Research and Engineering under Air Force Contract No. FA8702-15-D-0001. B.Y. acknowledges support from the Hertz Fellowship and NSF Graduate Fellowship. A.A. acknowledges support from the Clare Boothe Luce Graduate Fellowship. The views and conclusions contained herein are those of the authors and should not be interpreted as necessarily representing the official policies or endorsements, either expressed or implied, of the U.S. Government.
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