A general characterization method for nonlinearities in superconducting circuits | Zendy

Thomas Weißl | Zendy; Shan W. Jolin | Zendy; Riccardo Borgani | Zendy; Daniel Forchheimer | Zendy; David B. Haviland | Zendy

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A general characterization method for nonlinearities in superconducting circuits

Author(s) -

Thomas Weißl,

Shan W. Jolin,

Riccardo Borgani,

Daniel Forchheimer,

David B. Haviland

Publication year - 2019

Publication title -

new journal of physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.584

H-Index - 190

ISSN - 1367-2630

DOI - 10.1088/1367-2630/ab175a

Subject(s) - physics , intermodulation , microwave , nonlinear system , superconductivity , resonator , electronic circuit , characterization (materials science) , topology (electrical circuits) , optoelectronics , condensed matter physics , quantum mechanics , optics , electrical engineering , amplifier , engineering , cmos

Detailed knowledge of nonlinearity in superconducting microwave circuits is required for the optimal control of their quantum state. We present a general method to precisely characterize this nonlinearity to very high order. Our method is based on intermodulation spectroscopy at microwave frequencies and does not require DC-connection or DC-measurement of an on-chip reference structure. We give a theoretical derivation of the method and we validate it by reconstructing a known nonlinearity from simulated data. We experimentally demonstrate the reconstruction of the unknown nonlinear current-phase relation of a microwave resonator with superconducting nanowires.

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