Measurement-induced state transitions in dispersive qubit readout schemes
arXiv:2402.07360 · doi:10.1103/PhysRevApplied.22.064038
Abstract
The dispersive-readout scheme enables quantum nondemolition measurement of superconducting qubits. An increased readout power can shorten the readout time and reduce the state discrimination error but can promote qubit transitions into higher noncomputational states. The ability to predict the onset of these measurement-induced state transitions can aid the optimization of qubit circuits and provide means for comparing the readout performance of different qubit types. Building upon the concept of dressed coherent states, we consider two straightforward metrics for determining the maximum number of photons that can be used for dispersive readout without causing state transitions. We focus on the fluxonium readout to demonstrate the independence of the metrics from any qubit-type-specific approximations. The dispersive readout of transmons and other superconducting qubits can be treated universally in the same fashion.
18 pages, 11 figures; accepted version
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Cited by in corpus (7)
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- Wireless Josephson parametric amplifier above 20 GHz
- Non-demolition fluorescence readout and high-fidelity unconditional reset of a fluxonium qubit via dissipation engineering
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- Mitigating state transition errors during readout with a synchronized flux pulse
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