Transmon qutrits serve as erasure qubits achieving logical T1 over 500 μs with mid-circuit detection, ten times the physical qubit lifetime, plus low-error gates and heralded Bell states.
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Experimental mapping of measurement-induced state transitions in a fluxonium qubit validates numerical models predicting eleven high-error flux regions, including effects from superinductor array modes.
In two-transmon systems, a spectator qubit lowers the MIST threshold of the readout qubit and can itself be affected by the readout qubit's transitions, with a coupler further modifying both effects.
Experimental verification that transmon ionization under strong readout drives is a controllable Landau-Zener transition, with quantitative measurements of critical photon numbers and population transfer matching a semiclassical model.
Offset-charge-tunable transmon qubit achieves 99.37% fidelity in charge-parity mapping and over 93.4% in continuous monitoring at 4 μs intervals via randomized benchmarking.
citing papers explorer
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Hardware-Efficient Erasure Qubits With Superconducting Transmon Qutrits
Transmon qutrits serve as erasure qubits achieving logical T1 over 500 μs with mid-circuit detection, ten times the physical qubit lifetime, plus low-error gates and heralded Bell states.
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Experimental Characterization and Modeling of Measurement-Induced State-Transitions in a Fluxonium Superconducting Qubit
Experimental mapping of measurement-induced state transitions in a fluxonium qubit validates numerical models predicting eleven high-error flux regions, including effects from superinductor array modes.
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Measurement-induced state transitions in multi-qubit transmon processors
In two-transmon systems, a spectator qubit lowers the MIST threshold of the readout qubit and can itself be affected by the readout qubit's transitions, with a coupler further modifying both effects.
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Probing excited-state dynamics of transmon ionization
Experimental verification that transmon ionization under strong readout drives is a controllable Landau-Zener transition, with quantitative measurements of critical photon numbers and population transfer matching a semiclassical model.
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Characterizing charge-parity detection based on an offset-charge-tunable transmon qubit via randomized benchmarking
Offset-charge-tunable transmon qubit achieves 99.37% fidelity in charge-parity mapping and over 93.4% in continuous monitoring at 4 μs intervals via randomized benchmarking.