Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session J28: Superconducting Qubits: Coherence and Two-Level Systems
3:00 PM–6:00 PM,
Tuesday, March 16, 2021
Sponsoring
Unit:
DQI
Chair: Robert McDermott, University of Wisconsin - Madison
Abstract: J28.00010 : Power and temperature dependence of High Q superconducting resonators
4:48 PM–5:00 PM
Live
Presenter:
Ashish Alexander
(Laboratory of Physical Sciences, University of Maryland, College Park)
Authors:
Ashish Alexander
(Laboratory of Physical Sciences, University of Maryland, College Park)
Christopher Weddle
(Laboratory of Physical Sciences, University of Maryland, College Park)
Christopher J K Richardson
(Laboratory of Physical Sciences, University of Maryland, College Park)
Here we propose a two-temperature, power, and temperature dependent model to evaluate resonator losses that define the driven quasiparticle density by a separate effective temperature than the bath temperature. The model also explores the contribution of the readout power for different power and temperature. The model is investigated on the resonators fabricated from epitaxial molecular beam epitaxy grown aluminum and titanium nitride on float-zone refined silicon. The resonators have quality factors above 1M. The contribution of various loss mechanisms is also examined.
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