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Broadband filters for abatement of spontaneous emission in circuit quantum electrodynamics

Author(s): Bronn, NT; Liu, Y; Hertzberg, JB; Córcoles, AD; Houck, Andrew A; et al

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Abstract: The ability to perform fast, high-fidelity readout of quantum bits (qubits) is essential to the goal of building a quantum computer. However, coupling a fast measurement channel to a superconducting qubit typically also speeds up its relaxation via spontaneous emission. Here, we use impedance engineering to design a filter by which photons may easily leave the resonator at the cavity frequency but not at the qubit frequency. We implement this broadband filter in both an on-chip and off-chip configuration.
Publication Date: Oct-2015
Electronic Publication Date: Oct-2015
Citation: Bronn, NT, Liu, Y, Hertzberg, JB, Córcoles, AD, Houck, AA, Gambetta, JM, Chow, JM. (2015). Broadband filters for abatement of spontaneous emission in circuit quantum electrodynamics. Applied Physics Letters, 107 (10.1063/1.4934867
DOI: doi:10.1063/1.4934867
Type of Material: Journal Article
Journal/Proceeding Title: Applied Physics Letters
Version: Author's manuscript



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