Measurement of Positronium hyperfine splitting with quantum oscillation
arXiv:1002.4567 · doi:10.1088/1742-6596/225/1/012045 10.1016/j.physletb.2011.01.052
Abstract
Interference between different energy eigenstates in a quantum system results in an oscillation with a frequency which is proportional to the difference in energy between the states. Such an oscillation is observable in polarized positronium when it is placed in a magnetic field. In order to measure the hyperfine splitting of positronium, we perform the precise measurement of this oscillation using a high quality superconducting magnet and fast photon-detectors. A result of ~GHz is obtained which is consistent with both theoretical calculations and previous precise measurements.
4 figures accepted by Phys. Lett. B