Under conditions where the total angular momentum of a ferromagnet is dominated by its intrinsic spin, the ferromagnet is predicted to behave as a gyroscope. If such a ferromagnetic gyroscope (FG) can be sufficiently isolated from the environment, it has the potential to measure spin-dependent interactions with a sensitivity far surpassing that of other systems. The high sensitivity is the result of rapid averaging of quantum noise. We propose to use a mm-scale FG in orbit around the Earth to investigate physics at the intersection between quantum mechanics and general relativity by measuring relativistic frame dragging (the Lense-Thirring effect) with intrinsic spin. The behavior of intrinsic spin in spacetime dragged by a massive rotating body is an experimentally open question, hence the results of such a measurement may have important theoretical consequences. This work was supported by the Moore Foundation, the Heising-Simons Foundation, and the National Science Foundation under Grant PHY-1707875.
|Title of host publication||APS Division of Atomic and Molecular Physics Meeting 2020|
|State||Published - 2020|