A tunable coupler design enables sub-100 ns two-qubit gates with errors below 10^{-4} between fluxonium qubits over 1 cm distances for modular architectures.
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Lighter fluxonium qubits show lower susceptibility to measurement-induced state transitions than heavier counterparts due to reduced multi-photon resonance density, smaller required coupling, and more harmonic charge operator structure.
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.
citing papers explorer
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Long-range tunable coupler for modular fluxonium quantum processors
A tunable coupler design enables sub-100 ns two-qubit gates with errors below 10^{-4} between fluxonium qubits over 1 cm distances for modular architectures.
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Measurement-induced state transitions across the fluxonium qubit landscape
Lighter fluxonium qubits show lower susceptibility to measurement-induced state transitions than heavier counterparts due to reduced multi-photon resonance density, smaller required coupling, and more harmonic charge operator structure.
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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.