Enriching quantum systems with dynamic magnon-mediated interactions

Abstract

Quantum technology is trending toward larger, increasingly interconnected networks of diverse platforms, where coherent information transfer among disparate hardware is essential yet challenging. Magnons, the quanta of spin waves, couple strongly to both bosonic and fermionic quantum objects, offering a route to bridge platforms. This dissertation develops dynamic magnon-mediated interactions that use short, shaped magnetic-field pulses to tune the magnon resonance on demand, linking modules only when needed. By choosing the temporal profile, these pulses deterministically set when, how strongly, and for how long hybrid systems interact, enabling unitary operations such as coherent state transfer, interference, and entanglement not accessible with static or quasi-static control.