Talk – William D. Oliver (MIT)
The QEC is very excited to be hosting a talk by Professor William D. Oliver from the Massachusetts Institute of Technology:
Giant Artificial Atoms and Molecules: Chiral (Directional) Photon Emission via Waveguide QED
William D. Oliver, Ph.D.
Department of Electrical Engineering and Computer Science & Department of Physics
Principal Investigator, Engineering Quantum Systems Group
Massachusetts Institute of Technology
In this talk, we present a demonstration of “giant artificial atoms” realized with superconducting qubits in a waveguide QED architecture. The superconducting qubits couple to the waveguide at multiple, well-separated locations. In this configuration, the dipole approximation no longer holds, and the giant atom may quantum mechanically self-interfere. This system enables tunable qubit-waveguide couplings with large on-off ratios and a coupling spectrum that can be engineered by design. Multiple, interleaved qubits in this architecture can be switched between protected and emissive configurations, while retaining qubit-qubit interactions mediated by the waveguide. Using this architecture, we generate a Bell state with 94% fidelity, despite both qubits being strongly coupled to the waveguide. We furthermore use an artificial molecule comprising two qubits to demonstrate directional photon emission with 97% fidelity (a chiral waveguide). These works along with 3D integration target modular quantum information processing platform mediated by quantum interconnects.
|17:15 – 18:15
|18:15 – 19:15