Your browser is unsupported

We recommend using the latest version of IE11, Edge, Chrome, Firefox or Safari.

Nov 4 2022

Coherent Information Processing with Hybrid Magnonics Embedded in Superconducting Circuits

ECE 595 Seminar Series

November 4, 2022

11:00 AM - 12:00 PM


Lecture Center C1


802 S. Halsted St., Chicago, IL 60607

Coherent Information Processing with Hybrid Magnonics Embedded in Superconducting Circuits

Presenter: Yi Li, Argonne National Laboratory

Abstract: Hybrid dynamic systems have recently attracted great attention due to their applications in quantum computing, communications, and sensing. In particular, they provide a new paradigm for combining platforms and devices that can perform different tasks such as storing, processing, and transmitting coherent states. In this talk, I will discuss the potential in quantum information processing brought by magnon—the collective excitations of magnetization. Magnons exhibit a few key features making them highly competitive in quantum information processing, namely their strong coupling to microwave photons, their extraordinary tunability and flexibility for chip-based circuit integration. In particular, we focus on the integration of magnetic materials and devices with superconducting microwave circuits which is compatible with other major quantum modules. In the lecture, I will demonstrate strong coupling between magnons and microwave photons by integrating Ni80Fe20 (permalloy) thin-film devices with coplanar superconducting resonators, allowing for high coupling efficiency and device miniaturization. I will also utilize single-crystal Y3Fe5O12 (YIG) spheres and show how they can also be chip-embedded with superconducting resonators. We achieve state-of-the-art magnon decoherence rate down to 1 MHz and sub-gigahertz magnon-photon coupling strength. With the new platform, we also achieve coherent level repulsion and dissipative level attraction between the magnon modes of the two remote YIG spheres. Our results open new avenues towards integrating hybrid magnonic networks for coherent information processing on a quantum-compatible superconducting platform.

Speaker bio: Yi Li is currently an assistant scientist in the Materials Science Division at Argonne National Laboratory. He has obtained his BS degree in physics from Peking University, China (2009) and his PhD in materials science and engineering from Columbia University (2015). Prior to working at Argonne, Li held a postdoctoral appointment at CEA Saclay in France (2015-2017). Li's research focuses on building hybrid quantum magnonic circuits based on microwave superconducting circuits and magnetic devices for their applications in quantum information processing. Yi was the recipient of the Postdoctoral Performance Awards (2020) at Argonne National Laboratory, and the IEEE Chicago "Distinguished R&D" Award (2020) for his pioneering work on magnon-photon coupling in superconducting resonator for Quantum Information Science.

Faculty host: Zizwe Chase

This program will also be available via Zoom, contact ECE Student Affairs for login details. The lecture will not be recorded. 


ECE Student Affairs

Date posted

Nov 10, 2022

Date updated

Nov 10, 2022