Symmetrically coupled dispersive readout achieves 384 ns single-shot erasure detection on dual-rail qubits with 6.0(2)×10^{-4} residual error per check and enables parallel erasure checks during single-qubit gates with median 7.2×10^{-5} error per gate.
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Microscopic unitary simulation of circuit QED readout shows qubit T1 drops with increasing drive amplitude when a Purcell notch filter is at the qubit frequency, exposing qualitative defects in Lindblad master equations.
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Fast, High-Fidelity Erasure Detection of Dual-Rail Qubits with Symmetrically Coupled Readout
Symmetrically coupled dispersive readout achieves 384 ns single-shot erasure detection on dual-rail qubits with 6.0(2)×10^{-4} residual error per check and enables parallel erasure checks during single-qubit gates with median 7.2×10^{-5} error per gate.
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First-principles study of dispersive readout in circuit QED
Microscopic unitary simulation of circuit QED readout shows qubit T1 drops with increasing drive amplitude when a Purcell notch filter is at the qubit frequency, exposing qualitative defects in Lindblad master equations.