Year: 2019
Type: article
Abstract: Improving qubit coherence times is fundamental to the development of quantum computing technology. In most experiments in circuit quantum electrodynamics, dephasing induced by residual thermal photons in the readout resonator limits the coherence times of superconducting qubits. The authors design and test a type of microwave cavity attenuator that can be well thermalized to the base stage of a dilution refrigerator. With these cavity attenuators, they reproducibly measure enhanced qubit coherence times and report very low thermal-photon populations in the readout mode. This invention is a useful addition to the toolbox for state-of-the-art quantum circuitry.
Source: Physical Review Applied
Institution: Yale University
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2884815215