| We would like to discuss a method to determine both the dipole and quadrupole polarizabilities accurately within the framework of the relativistic coupled-cluster theory, especially in the atomic systems. In this approach, we directly solve the first order perturbed equation arising from a general one-electron perturbation, thereby avoiding an explicit summation over intermediate states. We will also emphasize the points that how this method can be applied to a wide range of problems including the high precision calculations of very small but finite parity non-conserving and CP violating amplitudes. At last, we will present some results and compare with other calculations along with measurements . Trends of electron correlation effects in this study will also be discussed. |
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