Cyclic control via parameter-space expansion restores controllability in fast CZ gates despite short-timescale distortions, cutting average coherent error from 0.27% to 0.12% in superconducting qubit experiments without extending gate duration.
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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.
A planar trimon circuit with three modes achieves universal Hamiltonian control, implementing all 16 two-qubit Pauli operators and operating as an 8-state qudit with higher coherence than standard transmons.
citing papers explorer
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Overcoming the Speed-Fidelity Trade-off in Fast CZ Gates via Cyclic Control
Cyclic control via parameter-space expansion restores controllability in fast CZ gates despite short-timescale distortions, cutting average coherent error from 0.27% to 0.12% in superconducting qubit experiments without extending gate duration.
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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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Universal Hamiltonian control in a planar trimon circuit
A planar trimon circuit with three modes achieves universal Hamiltonian control, implementing all 16 two-qubit Pauli operators and operating as an 8-state qudit with higher coherence than standard transmons.