Yttrium iron garnet (YIG) thin film have spin wave (magnon) modes with low dissipation and is a possible candidate for quantum information processing. However, the coherent coupling between a quantum device and YIG thin film has yet been demonstrated. In this talk, I will introduce a scheme to achieve strong coupling between superconducting (SC) ﬂux qubits and magnon modes in YIG thin film. I will show you: i) an additional spatial-dependent phase factor existed when the qubits are magnetically coupled with the magnon modes of finite-wavelength; ii) numerical simulation that demonstrates avoided crossing and coherent transfer of quantum information between the ﬂux qubit and the standing spin waves in YIG thin films; iii) YIG thin film being used as a tunable switch between two flux qubits, which have modified shape with small direct inductive coupling between them.
Shaojie Yuan is a Research Assistant Professor at Shenzhen Institute for Quantum Science and Engineering. He got a BS in physics from University of Science and Technology of China in 2008, a MS in physics from Florida State University in 2011, and a Ph.D. in physics from Florida State University and National High magnetic lab in 2015. From 2016 to 2018, he was a Postdoctoral Researcher at Beijing Computing Science Research Center. From 2018-2020, he was a Postdoctoral Researcher at South University of Science and Technology. Since 2020 until present, he joined Shenzhen Institute for Quantum Science and Engineering as a Research Assistant Professor. His research focus on hybridization of superconducting qubits with spin waves, quantum machine learning, etc.
Seminar by the NYU-ECNU Institute of Physics at NYU Shanghai