Dartmouth Events

Physics and Astronomy Colloquium - Professor William Oliver, MIT

Title: Quantum Interconnects and Modularity via Waveguide QED

10/2/2026
2:15 pm – 3:15 pm
Wilder 104 and Zoom
Intended Audience(s): Public
Categories: Lectures & Seminars, School of Arts and Sciences

Abstract: 

In this talk, we present a demonstration of entanglement distribution via directional photon emission and absorption along a waveguide [1,2]. Superconducting qubits couple to the waveguide at multiple, well-separated locations through modules that deterministically emit and absorb single microwave photons. Using this architecture, we demonstrate directional single-photon emission with 96% fidelity and single-photon absorption exceeding 60% efficiency. We then use partial emission and absorption to generate remote entanglement – a four-qubit W-state – between qubits in the emitter and absorber modules with 62% fidelity. Time permitting, we also present an example of driven dissipative entanglement reaching 89% fidelity [3]. These works along with 3D integration target modular and extensible quantum information processing mediated by quantum interconnects.

[1] B. Kannan, et al., Nature Physics 19, 394 (2023) | arXiv:2203.01430 (2022)

[2] A. Almanakly, et al., Nature Physics 21, 825 (2025) | arXiv:2408.05164 (2024)

[3] A. Almanakly, et al., accepted to Nature Physics | arXiv:2606.13375 (2026)

 

Hosted by Professor Chandrasekhar Ramanathan 

Zoom Webinar Link: https://dartmouth.zoom.us/j/91888702369?pwd=aUlaVEFYNGZHNlZWL0R3cEVWQXg4UT09

For more information, contact:
Samantha Marcotte
samantha.j.marcotte@dartmouth.edu
Permanent URL to this event: https://physics.dartmouth.edu/events/event?event=82627

Events are free and open to the public unless otherwise noted.