Michelson-Morley Experiment for Electrons
A new experiment conducted at the University of California at Berkeley used quantum information techniques for a precision test of a cornerstone principle of physics, namely Lorentz invariance. This precept holds that the results of a physics experiment do not depend on its absolute spatial orientation. The work uses quantum-correlated electrons within a pair of calcium ions to look for shifts in quantum energy levels with unprecedented sensitivity. JQI Adjunct Fellow and University of Delaware professor Marianna Safronova, who contributed a theoretical analysi