Floquet-Engineered Dissipation via Pulsed Parametric Modulation
ORAL
Abstract
Parametric frequency modulation is a powerful tool for engineering effective interactions and controlled dissipation in superconducting qubits. When a qubit is modulated at an appropriate frequency, parametric resonance with a dissipative resonator leads to enhanced qubit decay. While continuous modulation is well understood through Bessel-function sidebands, the behavior under time-structured modulation remains largely unexplored. Here we present an experimental study of pulsed modulation with variable on/off durations and its impact on the dissipation of a tunable transmon qubit. We find that pulsed modulation dramatically reshapes frequency response of the dissipation, yielding a rich landscape of decay features. These results show how pulsed modulation can change the dissipative spectrum of a qubit, offering new ways to control open quantum dynamics.
*This work is supported by the NSF Grant No. PHY-2408932 and No. 215222, the Multidisciplinary University Research Initiative (MURI) Award on Programmable systems with non-Hermitian quantum dynamics (Grant No. FA9550-21-1-0202), and ONR Grant No. N000142512160. Devices were fabricated and provided by the Superconducting Qubits at Lincoln Laboratory (SQUILL) Foundry at MIT Lincoln Laboratory, with funding from the Laboratory for Physical Sciences (LPS) Qubit Col-laboratory.
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Presenters
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Pratik J Barge
- Washington University in St. Louis
- Washington University, St. Louis