Interfacing superconducting qubits and quantum light

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H05461
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: The University of Tokyo
• Principal Investigator: Usami Koji 東京大学, 先端科学技術研究センター, 准教授 (90500116)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 量子光学 / 磁性物理学

Outline of Final Research Achievements

In this study, we are aiming at realizing microwave-to-optical photon conversion through ordered spins in ferromagnetic materials, which embrace both merits of collectively enhanced interaction typically realized with the paramagnetic spin ensemble and rigidity against nearest neighbor unwanted interaction. We achieved 1) the coherent and bidirectional conversion between microwave and optical photons through magnons in a magnetostatic mode of a ferromagnetic sphere, 2) pioneering a new research field called "cavity opto-magnonics" to enhance photon-magnon coupling, and 3) understanding the origin of peculiar non-reciprocal interaction between photons and magnons in the setting of cavity opto-magnonics.

Free Research Field

量子光学