Hybrid spin–transmon systems
A spin qubit may interface with a superconducting circuit mode.
$$H_{\rm int}=\hbar g(\sigma_+b+\sigma_-b^\dagger)$$
Physical intuition
A spin qubit may interface with a superconducting circuit mode.
Deep dive: physical mechanism
Electric dipole coupling and intermediary resonators bridge disparate qubit frequencies and impedances.
What is measured experimentally?
Avoided crossings and state transfer reveal coherent hybridization.
Assumptions, noise and limitations
Frequency mismatch and loss in the intermediary can dominate.
Research and simulation exercise
Simulate a two-mode excitation swap.
Connect the ideas
Explore the chapter overview, learning path, and references.