Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Bulletin of the American Physical Society

Cross-resonance Dynamics with Tunable Transmon Qubits

Bradley Mitchell, Ravi Naik, Akel Hashim, John Mark Kreikebaum, Irfan A. Siddiqi

Published Mar 5, 2020• 0 citations
OpenAlex

Related papers

Weakly-tunable transmon qubits in a multi-qubit architecture

Jared Hertzberg, Nicholas T. Bronn, Antonio D. Corcoles +7 more

Bulletin of the American Physical Society•Mar 16, 2016•0 citations

Dephasing in tunable Xmon transmon qubits

R. Barends, Zijun Chen, Paul V. Klimov +7 more

Bulletin of the American Physical Society•Mar 9, 2018•0 citations

Concentric transmon qubit featuring fast tunability and site-selective Z coupling

Martin P. Weides, Jochen Braumüller, Martin Sandberg +10 more

Bulletin of the American Physical Society•Mar 16, 2016•0 citations

Towards long lived tunable transmon qubit in microstrip geometry

Jochen Braumüller, Lucas Radtke, Hannes Rotzinger +2 more

Verhandlungen der Deutschen Physikalischen Gesellschaft•Jan 1, 2013•0 citations

Cross-resonance interactions between superconducting qubits with variable detuning

Matthew Ware, Blake Johnson, Jay Gambetta +3 more

Cross-resonance interactions are a promising way to implement all-microwave two-qubit gates with fixed-frequency qubits. In this work, we study the dependence of the cross-resonance interaction rate on qubit-qubit detuning and compare with a model that includes the higher levels of a transmon system. To carry out this study we employ two transmon qubits--one fixed frequency and the other flux tunable--to allow us to vary the detuning between qubits. We find that the interaction closely follows a three-level model of the transmon, thus confirming the presence of an optimal regime for cross-resonance gates.

arXiv:1905.11480•May 27, 2019•12 citations

Flux-tunable superconducting transmons for quantum information processing

Matthew Ware

In this thesis, I describe a series of experiments using flux-tunable transmon qubits for quantum information processing. These qubits are designed with different levels of Josephson junction asymmetry. The first two chapters of this thesis will introduce the reader to superconducting qubits and circuit quantum electrodynamics. I will present experiments using the cQED architecture to implement fast photon swapping between an asymmetric qubit and a superconducting resonator using flux-driven sidebands. This is the first experimental observation of flux-driven sidebands in a superconducting system. This process also allows photon swaps between qubit and resonator to first order in the qubit-resonator coupling strength. I will detail an experiment to study and optimize an all-microwave two-qubit gate using the cross-resonance effect. This work constitutes the first experimental study of the cross-resonance effect vs. frequency and confirms effects from the higher energy levels of the transmon in the effective coupling during a cross-resonant drive. Lastly, I will outline a theoretical analysis and initial experiments to study the coherence properties of asymmetric transmons.

•Jan 1, 2015•2 citations
Cross-resonance interactions are a promising way to implement all-microwave two-qubit gates with fixed-frequency qubits. In this work, we study the dependence of the cross-resonance interaction rate on qubit-qubit detuning and compare with a model that includes the higher levels of a transmon system. To carry out this study we employ two transmon qubits--one fixed frequency and the other flux tunable--to allow us to vary the detuning between qubits. We find that the interaction closely follows a three-level model of the transmon, thus confirming the presence of an optimal regime for cross-resonance gates.
In this thesis, I describe a series of experiments using flux-tunable transmon qubits for quantum information processing. These qubits are designed with different levels of Josephson junction asymmetry. The first two chapters of this thesis will introduce the reader to superconducting qubits and circuit quantum electrodynamics. I will present experiments using the cQED architecture to implement fast photon swapping between an asymmetric qubit and a superconducting resonator using flux-driven sidebands. This is the first experimental observation of flux-driven sidebands in a superconducting system. This process also allows photon swaps between qubit and resonator to first order in the qubit-resonator coupling strength. I will detail an experiment to study and optimize an all-microwave two-qubit gate using the cross-resonance effect. This work constitutes the first experimental study of the cross-resonance effect vs. frequency and confirms effects from the higher energy levels of the transmon in the effective coupling during a cross-resonant drive. Lastly, I will outline a theoretical analysis and initial experiments to study the coherence properties of asymmetric transmons.