2014/01/31 by Trevor M. Leslie, T. M. Leslie, E. Weisman +5
Physics and Astronomy · #Atomic and Subatomic Physics Research #Condensed matter physics #Dysprosium #Electron #Fermion #Ferrimagnetism #Magnetic field #Magnetism #Magnetization #Materials science #Mechanical and Optical Resonators #Nuclear physics #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Range (aeronautics) #Spin (aerodynamics) #Spins #gr-qc #hep-ph
paper · pdf · doi:10.1103/physrevd.89.114022
published as Phys. Rev. D 89 114022 (2014) · 13 pages, 6 figures, REVTeX 4.1, new title, additional authors, now with experimental results on polarized test masses
openalex publication_date 2014/06/24 · arxiv created 2014/06/26 · arxiv updated 2014/06/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
A study of the possible interactions between fermions assuming only rotational invariance has revealed 15 forms for the potential involving the fermion spins. We review the experimental constraints on unobserved macroscopic, spin-dependent interactions between electrons in the range below 1 cm. An existing experiment, using 1 kHz mechanical oscillators as test masses, has been used to constrain mass-coupled forces in this range. With suitable modifications, including spin-polarized test masses, this experiment can be used to explore all 15 possible spin-dependent interactions between electrons in this range with unprecedented sensitivity. Samples of ferrimagnetic dysprosium iron garnet have been fabricated in the suitable test mass geometry and shown to have spin densities on the order of 1020\ensuremathℏ/cm3 with very low intrinsic magnetism.