Integrated levitated magnetomechanics with single spins via in-situ micromanipulation

Coupling quantum nonlinearities to mechanics is an outstanding challenge in the field of quantum science. Realizing such a system would prove useful for applications in quantum metrology and quantum information. Previously, we demonstrated a levitated system consisting of micromagnets over a type-II superconductor. The magnet's center of mass was shown to be trapped in three dimensions, resulting in modes at more than 10 kHz and quality factors of ~10^6. We also demonstrated the coupling of the levitated magnet to the spin of a single nitrogen-vacancy center in diamond, ~0.048(2) Hz. We discuss recent improvements to the platform, which will allow us to achieve stronger spin-mechanical couplings, enabling near-term milestones such as the detection of quantum backaction, which is a first step towards mechanics in the quantum regime. In addition, we will also discuss our progression towards an on-chip spin-mechanical system, offering NV centers with microwave control and superconductor trapping on one compact device. This recent progress can be considered a building block towards a scalable quantum device.