Prof. Das Bhanu (Tokyo Institute of Technology)
The electric dipole moment (EDM) of the electron due to violations of T and P symmetries is a sensitive probe of new physics beyond the Standard Model of elementary particles. It could provide useful insights into the matter-antimatter asymmetry in the Universe. A number of experiments on paramagnetic molecules are currently under way to search for the electron EDM, and an upper limit for it is obtained by combining the results of these experiments with the calculations of the effective electric field on the electron. It was shown by Sandars over 50 years ago that the effective electric field is relativistic in origin. Indeed, it is necessary to use an accurate relativistic many-body theory to calculate this quantity. In my talk, I will emphasize the unique features of the relativistic coupled cluster (RCC) theory and apply it to calculate the effective electric fields on the electron in YbF, mercury halides, mercury alkalis and ytterbium hydroxide. The latter two cases demonstrate the power of the RCC theory in aiding the search for suitable molecules for electron EDM experiments.