Reducing microwave loss in superconducting resonators due to trapped vortices

C. Song, M. P. Defeo, K. Yu, B. L.T. Plourde

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

Microwave resonators with high quality factors have enabled many recent breakthroughs with superconducting qubits and photon detectors, typically operated in shielded environments to reduce the ambient magnetic field. Insufficient shielding or pulsed control fields can introduce vortices, leading to reduced quality factors, although increased pinning can mitigate this effect. A narrow slot etched into the resonator surface provides a straightforward method for pinning enhancement without otherwise affecting the resonator. Resonators patterned with such a slot exhibited over an order of magnitude reduction in the excess loss due to vortices compared with identical resonators from the same film with no slot.

Original languageEnglish (US)
Article number232501
JournalApplied Physics Letters
Volume95
Issue number23
DOIs
StatePublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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