2011/06/30 by M. Smiciklas, Marc Smiciklas, J. M. Brown +6 · 2 citations
Chemistry · Mathematics · Physics and Astronomy · #Advanced NMR Techniques and Applications #Algorithm #Anisotropy #Astrophysics #Atomic and Subatomic Physics Research #Computer science #Geometry #Lorentz covariance #Lorentz factor #Lorentz transformation #Mathematics #Noncommutative and Quantum Gravity Theories #Physics #Quantum mechanics #Sidereal time #Spin (aerodynamics) #Tensor (intrinsic definition) #hep-ph #physics.atom-ph
paper · pdf · doi:10.1103/physrevlett.107.171604
5 pages
arxiv created 2011/09/02 · openalex publication_date 2011/10/21 · arxiv updated 2015/05/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We develop a new comagnetometer using (21)Ne atoms with nuclear spin I=3/2 and Rb atoms polarized by spin exchange with K atoms to search for tensor interactions that violate local Lorentz invariance. We frequently reverse the orientation of the experiment and search for signals at the first and second harmonics of the sidereal frequency. We constrain 4 of the 5 spatial Lorentz-violating coefficients c(jk)(n) that parametrize anisotropy of the maximum attainable velocity of a neutron at a level of 10(-29), improving previous limits by 2 to 4 orders of magnitude and placing the most stringent constraint on deviations from local Lorentz invariance.