Broadband filters for abatement of spontaneous emission in circuit quantum electrodynamics

Nicholas T. Bronn, Yanbing Liu, Jared B. Hertzberg, Antonio D. Córcoles, Andrew A. Houck, Jay M. Gambetta, Jerry M. Chow

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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.

Original languageEnglish (US)
Article number172601
JournalApplied Physics Letters
Volume107
Issue number17
DOIs
StatePublished - Oct 26 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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