Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session K48: Strongly Driven Superconducting Systems
3:00 PM–5:48 PM,
Tuesday, March 5, 2024
Room: 200E
Sponsoring
Unit:
DQI
Chair: Antoine Brillant, University of Chicago
Abstract: K48.00007 : Fast-switching coupler for measuring the interaction dynamics of a system formed of a flux qubit coupled to a waveguide in the ultra-strong coupling regime*
4:12 PM–4:24 PM
Presenter:
Noah Janzen
(University of Waterloo)
Authors:
Noah Janzen
(University of Waterloo)
Lucas Hak
(University of Waterloo)
Xi Dai
(University of Waterloo)
Elena Cornick
(University of Waterloo)
Adam Teixidó-Bonfill
(University of Waterloo)
Eduardo Martín-Martínez
(University of Waterloo)
Adrian Lupascu
(University of Waterloo)
We present results of a theoretical analysis of the system, that includes the role of higher levels of the qubit circuit and a realistic model for qubit measurement. Next, we present our experimental work in progress. In our design, using control pulses sent through bias lines near the coupler, the coupling strength can be fast-tuned at sub nanosecond time scales. Measurements can be done by decoupling the qubit from the waveguide, followed by state readout using a coupled DC-SQUID. This work opens new avenues for experiments on dynamics in the spin-boson model at strong coupling and entanglement harvesting.
*We acknowledge support from the NSERC through Discovery and RTI grants, Canada Foundation for Innovation, Ontario Ministry of Research and Innovation, and Industry Canada.
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