A Tutorial for Characterizing Transmon Qubits

• URL: http://arxiv.org/abs/2606.03815v1
• Date: Tue, 02 Jun 2026 15:57:47 GMT
• Title: A Tutorial for Characterizing Transmon Qubits
• Abstract summary: We present a comprehensive walkthrough for the characterization and optimization of tunable transmon qubits.<n>We detail in a straightforward manner the complete workflow, from cryogenic setup and wiring to parametric amplifier optimum operation.<n>This guide serves as a reference for experimentalists seeking to efficiently bring up transmon-based quantum devices.
• Score: 35.18016233072556
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Superconducting transmon qubits are a leading technology for quantum information processing, yet their reliable operation rests on meticulous calibration and characterization routines. These processes have been fine-tuned and are relatively well understood by the quantum computing community. Nevertheless, it is often challenging for newcomers to compile all the available information into a practical experimental flow. In this tutorial, we present a comprehensive walkthrough for the characterization and optimization of tunable transmon qubits, demonstrated on a commercial five-qubit processor. Moving beyond theoretical description, we detail in a straightforward manner the complete workflow, from cryogenic setup and wiring to parametric amplifier optimum operation, flux sweet-spot identification, pulse calibration, and readout optimization. We also demonstrate the characterization of qubit-qubit coupling, covering all steps before multiqubit operations. This guide serves as a reference for experimentalists seeking to efficiently bring up transmon-based quantum devices.

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