Quantum magnonics: The magnon meets the superconducting qubit
Abstract
The techniques of microwave quantum optics are applied to collective spin excitations in a macroscopic sphere of a ferromagnetic insulator. We demonstrate, in the single-magnon limit, strong coupling between a magnetostatic mode in the sphere and a microwave cavity mode. Moreover, we introduce a superconducting qubit in the cavity and couple the qubit with the magnon excitation via the virtual photon excitation. We observe the magnon-vacuum-induced Rabi splitting. The hybrid quantum system enables generation and characterization of non-classical quantum states of magnons.
- Publication:
-
Comptes Rendus Physique
- Pub Date:
- August 2016
- DOI:
- 10.1016/j.crhy.2016.07.009
- arXiv:
- arXiv:1508.05290
- Bibcode:
- 2016CRPhy..17..729T
- Keywords:
-
- Magnon;
- Ferromagnet;
- Yttrium-iron garnet;
- Superconducting qubit;
- Microwave;
- Quantum optics;
- Quantum Physics;
- Condensed Matter - Mesoscale and Nanoscale Physics
- E-Print:
- 10 pages, 6 figures