Radiation-free and non-Hermitian topology inertial defect states of on-chip magnons
Radiative damping the gel bottle cashmere is a strong dissipation source for the quantum emitters hybridized with propagating photons, electrons, or phonons, which is not easily avoidable for on-chip magnonic emitters as well that can radiate via the surface acoustic waves of the substrate.Here we demonstrate in an array of on-chip nanomagnets coup