Superconducting circuit devices are one of the most mature hardware platforms for developing quantum information technologies, but significant engineering advances are needed for them to reach their revolutionary potential in many applications. As these devices become increasingly sophisticated, high-fidelity numerical modeling methods are becoming vital tools to continue improving system performance. However, existing design tools are in their infancy and often very computationally inefficient.
In this talk, we will introduce a novel field-based description of superconducting circuit quantum devices, useful for developing intuitive, efficient, and high-fidelity numerical models. We will demonstrate how this approach can be applied to compute the spontaneous emission rate and exchange interaction rate of superconducting qubits. Additionally, we will explore how the formalism can integrate domain decomposition concepts with numerical mode decomposition methods to analyze complex devices more effectively. Finally, we will discuss self-consistent semiclassical modeling approaches for superconducting circuit quantum devices that treat microwave fields classically and qubits quantum mechanically, showing how these methods can efficiently characterize the fidelity of state control and readout for transmon and fluxonium qubits.
This comprehensive approach addresses existing inefficiencies and provides a robust framework for advancing the design and analysis of superconducting quantum devices.
About the Speaker:
Thomas ROTH is an Assistant Professor in the Elmore Family School of Electrical and Computer Engineering. He earned his B.S. degree in electrical and computer engineering from the Missouri University of Science and Technology, followed by his M.S. and Ph.D. degrees from the University of Illinois at Urbana-Champaign.
Before joining Purdue, he worked as a Senior Member of the Technical Staff at Sandia National Laboratories in the Radar Electromagnetics & Sensor Technologies department, where he was recognized as a 2019 Up & Coming Innovator.
He has received several prestigious awards, including the Young Scientist Awards at the 2023 Photonics & Electromagnetics Research Symposium and the URSI International Symposium on Electromagnetic Theory (1st place). He was also honored with the 2023 Ruth and Joel Spira Outstanding Teacher Award at Purdue University.
His research focuses on developing multiscale and multiphysics computational electromagnetics techniques, with a particular emphasis on analyzing quantum information processing devices.
Affiliation: Purdue University
Contact Person: Prof. Paolo ROCCA <paolo.rocca@unitn.it>