Environmental radiation impact on lifetimes and quasiparticle tunneling rates of fixed-frequency transmon qubits

Autor:	R. T. Gordon, C. E. Murray, C. Kurter, M. Sandberg, S. A. Hall, K. Balakrishnan, R. Shelby, B. Wacaser, A. A. Stabile, J. W. Sleight, M. Brink, M. B. Rothwell, K. P. Rodbell, O. Dial, M. Steffen
Rok vydání:	2022
Předmět:	Quantum Physics Physics and Astronomy (miscellaneous) Physics::Instrumentation and Detectors Condensed Matter::Superconductivity FOS: Physical sciences Quantum Physics (quant-ph)
Zdroj:	Applied Physics Letters. 120:074002
ISSN:	1077-3118 0003-6951
Popis:	Quantum computing relies on the operation of qubits in an environment as free of noise as possible. This work reports on measuring the impact of environmental radiation on lifetimes of fixed frequency transmon qubits with various capacitor pad geometries by varying the amount of shielding used in the measurement space. It was found that the qubit lifetimes are robust against these shielding changes until the most extreme limit was tested without a mixing chamber shield in the refrigerator. In contrast, the quasiparticle tunneling rates were found to be extremely sensitive to all configurations tested, indicating these devices are not yet limited by losses related to superconducting quasiparticles. Comment: 6 pages, 7 figures, and 2 tables
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bc213b01e95df143b8eec9ec02edc4f https://doi.org/10.1063/5.0078785 Zobrazit plný text záznamu