Quantum sensing and precision measurement for fundamental physics with levitated optomechanics

Due to their extreme environmental decoupling, levitated optomechanical systems provide a platform for quantum sensing and ultrasensitive measurement that can be applied to a variety of tests of fundamental physics. In this talk I will describe our recent efforts on using optically suspended spherical and high aspect ratio plate-like dielectric particles for tests of quantum effects related to gravity, tests of quantum foundations, searches for gravitational waves at high frequencies, and searches for wave-like ultralight dark matter. I will also discuss our work towards interfacing optically levitated nanoparticles with laser-cooled atoms as a hybrid quantum system with applications in quantum information science and precision measurement.