Year: 2025
Type: preprint
Abstract: Dispersive readout plays a central role in superconducting quantum computing, enabling quantum nondemolition measurements through a coupled microwave resonator. While stronger resonator drives can improve measurement speed and fidelity, they can also activate multi-photon resonances that trigger measurement-induced state transitions (MIST) out of the computational subspace. We develop a driven-dissipative framework for MIST that retains the quantum resonator response absent in semiclassical treatments and yields analytically derived transition-rate expressions. The upward and downward transition-rate profiles determine the steady-state populations and finite-time dynamics, enabling quantitative exploration across drive strength and detuning, while capturing the crossover between quantum-resolved and semiclassical-like dynamics. This framework reproduces the quantum dynamics and identifies a strongly driven regime beyond semiclassical Landau--Zener predictions, where delayed population transfer opens a finite-time readout window with high resonator photon population. These results establish MIST as a predictive driven-dissipative process and characterize strongly driven regimes that can be leveraged for measurement optimization.
Source: arXiv (Cornell University)
Authors: Pan, Bo-Syun, Lin, Yen-Hsiang, Wang, Chiao-Hsuan
Institution: National Center for Theoretical Sciences
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
Awards: G2250445128, G5805817991
OpenAlex ID: W4414528610
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