A Z3 discrete time crystal is realized in superconducting qutrits using native chiral interactions, producing robust period-tripling independent of initial state.
Pettersson Fors, J
6 Pith papers cite this work. Polarity classification is still indexing.
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A capacitively shunted double-transmon coupler enables a 99.92% fidelity parametrically driven iSWAP gate at zero flux between detuned transmons with minimal residual ZZ interaction.
HAML meta-learns a mapping from control inputs and device parameters to effective two-qubit Hamiltonian coefficients via simulation training, then adapts online with few measurements, recovering coefficients where Schrieffer-Wolff perturbation theory fails.
Geometry choices in bivariate-bicycle qLDPC syndrome extraction determine leading correlated error structure via weighted exposure, which correlates strongly with logical error rates and is reduced by biplanar layouts.
Cross-Kerr coupling in the two-photon bosonic regime of a SQUID-coupled phase qubit never vanishes due to potential asymmetry and coupler nonlinearity, with explicit limits on the number of coherent states needed for the approximation.
Perfect displacement of superconducting resonators is achieved via fast-forward scaling of drive amplitude or detuning, enabling high-speed R_ZZ gates in Kerr-cat qubits.
citing papers explorer
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A Qutrit Time Crystal Stabilized with Native Chiral Interactions
A Z3 discrete time crystal is realized in superconducting qutrits using native chiral interactions, producing robust period-tripling independent of initial state.
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Parametrically Driven iSWAP Gate Using a Capacitively Shunted Double-Transmon Coupler at the Zero-Flux Sweet Spot
A capacitively shunted double-transmon coupler enables a 99.92% fidelity parametrically driven iSWAP gate at zero flux between detuned transmons with minimal residual ZZ interaction.
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Data-Driven Hamiltonian Reduction for Superconducting Qubits via Meta-Learning
HAML meta-learns a mapping from control inputs and device parameters to effective two-qubit Hamiltonian coefficients via simulation training, then adapts online with few measurements, recovering coefficients where Schrieffer-Wolff perturbation theory fails.
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Geometry-induced correlated noise in qLDPC syndrome extraction
Geometry choices in bivariate-bicycle qLDPC syndrome extraction determine leading correlated error structure via weighted exposure, which correlates strongly with logical error rates and is reduced by biplanar layouts.
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Two-photon coupling via Josephson element II: Interaction dressing, cross-Kerr coupling, and limits of low-energy bosonic model
Cross-Kerr coupling in the two-photon bosonic regime of a SQUID-coupled phase qubit never vanishes due to potential asymmetry and coupler nonlinearity, with explicit limits on the number of coherent states needed for the approximation.
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Perfect displacement of a superconducting resonator via fast-forward scaling and its application to high-speed $R_{ZZ}$ gates in Kerr-cat qubits
Perfect displacement of superconducting resonators is achieved via fast-forward scaling of drive amplitude or detuning, enabling high-speed R_ZZ gates in Kerr-cat qubits.