Modeling and Harmonic Balance Analysis of Parametric Amplifiers for Qubit Read-out

• URL: http://arxiv.org/abs/2306.05177v2
• Date: Mon, 22 Jul 2024 08:13:39 GMT
• Title: Modeling and Harmonic Balance Analysis of Parametric Amplifiers for Qubit Read-out
• Authors: Daryoush Shiri, Hampus Renberg Nilsson, Pavan Telluri, Anita Fadavi Roudsari, Vitaly Shumeiko, Christian Fager, Per Delsing,
• Abstract summary: We show how nonlinear inductors based on combinations of superconducting Josephson junctions can be modeled in commercial circuit simulators. We also show how the harmonic balance (HB) is used in the reliable prediction of the amplifier performance.
• Score: 0.07179624965454194
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Predicting the performance of traveling-wave parametric amplifiers (TWPAs) based on nonlinear elements like superconducting Josephson junctions (JJs) is vital for qubit read-out in quantum computers. The purpose of this article is twofold: (a) to demonstrate how nonlinear inductors based on combinations of JJs can be modeled in commercial circuit simulators, and (b) to show how the harmonic balance (HB) is used in the reliable prediction of the amplifier performance e.g., gain and pump harmonic power conversion. Experimental characterization of two types of TWPA architectures is compared with simulations to showcase the reliability of the HB method. We disseminate the modeling know-how and techniques to new designers of parametric amplifiers.

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