Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session E26: Driven and Dissipative Superconducting Circuits
8:00 AM–11:00 AM,
Tuesday, March 5, 2019
BCEC
Room: 160B
Sponsoring
Unit:
DQI
Chair: Shyam Shankar, Yale Univ
Abstract: E26.00006 : Reconstructing Josephson Current-Phase Relations with Intermodulation Spectroscopy*
9:00 AM–9:12 AM
Presenter:
Shan Jolin
(Nanostructure Physics, KTH Royal Institute of Technology)
Authors:
Shan Jolin
(Nanostructure Physics, KTH Royal Institute of Technology)
Thomas Weißl
(Nanostructure Physics, KTH Royal Institute of Technology)
Riccardo Borgani
(Nanostructure Physics, KTH Royal Institute of Technology)
David Haviland
(Nanostructure Physics, KTH Royal Institute of Technology)
When driving with multiple tones, a nonlinear system will give rise to intermodulation, or frequency mixing. Two drive tones placed near a nonlinear resonance produces a comb of intermodulation products. We present a method based on matrix inversion to reconstruct the nonlinearity from a measurement of this comb [1, 2]. We apply this method to a microwave frequency comb generated from a Nb-coplanar waveguide resonator with Josephson weak-links. This method is useful for accurate characterization of nonlinearities in superconducting quantum circuits.
[1] Hutter et al., PRL 104, 050801 (2010)
[2] Platz et. al., Beilstein J. Nanotechnol., 4, 352–360 (2013)
*The authors acknowledge financial support from Knut and Alice Wallenberg Foundation.
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