Magnon interactions in hybrid quantum systems through magnetic-field-tunable components

Magnetic degrees of freedom, such as collective spin excitations that form magnon modes, hold promise as components of hybrid quantum devices due to benefits associated with their intrinsic properties, such as dissipationless information transport and coupling over broad frequency ranges. To mediate the interactions within such devices, complementary elements must be explicitly designed to respond to the presence of magnetic flux without compromising their operation. When coupling magnons to electromagnetic or mechanical modes, hybrid devices with particular geometries can mimic more complex interaction Hamiltonians, such as that describing radiation pressure in optomechanics. Such interactions can be an important resource for quantum technology applications, for example by allowing for controllable nonlinear effects between two bosonic modes without requiring additional elements or the injection of non-classical light. This talk will discuss the relationship between magnetic field tunability and device characteristics such as geometry, material properties, and ultimate limits given the constraints of the underlying microscopic interaction. Future devices under this paradigm can introduce an interaction reminiscent of optomechanics to the field of cavity magnonics.