Coherent control of magnon-polaritons in Nature Physics
Our new paper Coherent control of magnon-polaritons using an exceptional point, published today in Nature Physics, presents a method for coherent control of hybrid quantum states using non-Hermitian physics. This research, carried out in collaboration with Associate Professor Jevon Longdell at the University of Otago and Professor Stefan Rotter at the Vienna Technical University, was conceived and led by Dr. Nicholas Lambert, who also carried out the experimental implementation and measurements. This work was also featured with a News & Views.
In this study we investigated magnon–polariton modes—hybrid excitations formed by coupling microwave photons to collective spin excitations in yttrium iron garnet spheres. By embedding these spheres in actively controlled microwave resonators, we showed that rapid manipulation of gain and loss allows coherent control of the state of hybrid systems. We demonstrate energy transfer between modes by encircling an exceptional point (EP), and the preparation of equal superpositions of states by traversing the EP.
This work was also highlighed in the Quantum Insider
This work relates to our Project non-Hermitian Physics and Magnons
