Broadband filters for abatement of spontaneous emission in circuit quantum electrodynamics
- 26 October 2015
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 107 (17) , 172601
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.Keywords
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Funding Information
- IARPA (W911NF-10-1-0324)
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