energy levels / atomic energy levels / average total microwave magneticfield energy / low-energy / low-energy limit / recent search / constituent systems / atomic energy level shifts / energy-level shifts / high permeability metal / dual species noble gas maser / energy / /
Organization
Smithsonian Center for Astrophysics / U.S. Securities and Exchange Commission / Harvard / /
PHYSICAL REVIEW A 68, 063807 共2003兲 Testing CPT and Lorentz symmetry with hydrogen masers M. A. Humphrey, D. F. Phillips, E. M. Mattison, R. F. C. Vessot, R. E. Stoner, and R. L. Walsworth Harvard-Smithsonian Center