Abstract
Future precision experiments with trapped cold antihydrogen promise to provide extremely stringent tests of the fundamental symmetry between matter and antimatter (CPT symmetry) in the hadron as well as in the lepton sector. Ultrahigh-resolution Doppler-free two-photon laser-spectroscopy of ordinary hydrogen and antihydrogen might be used to compare matter and antimatter at unprecedented levels of experimental precision. In addition, there is the fascinating prospect to directly observe the gravitational force on antimatter, because antihydrogen is a pure antimatter system which is both stable and electrically neutral.
© 2009 IEEE
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