Precision theoretical determination of electric dipole matrix elements in atomic cesium

We perform high-precision calculations of the electric dipole matrix elements 1/2||D||n'P_1/2,3/2> with n=6,7 and n'=6,7,...,12 in atomic cesium using the relativistic coupled-cluster method. Our approach, which include nonlinear core singles, doubles, perturbative core triples, and valence triples, is the most sophisticated method to date. The uncertainties of our results is ~0.2% for transitions between low-lying state and at most ~2% for transitions to states with large principal quantum number.