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Fast reset and suppressing spontaneous emission of a superconducting qubit

Fast reset and suppressing spontaneous emission of a superconducting qubit

Spontaneous emission through a coupled cavity can be a significant decay channel for qubits in circuit quantum electrodynamics. We present a circuit design that effectively eliminates spontaneous emission due to the Purcell effect while maintaining strong coupling to a low-Q cavity. Excellent agreement over a wide range in frequency is …