Blackbody radiation shift for the optical clock transition in zinc and cadmium atoms

Abstract

Black-body radiation (BBR) shifts of the 1S0–3P0 clock transition in divalent atoms Cd and Zn are evaluated using accurate relativistic many-body techniques of atomic structure. Static polarizabilities of the clock levels and relevant electric-dipole matrix elements are computed. We also present a comparative overview of the BBR shifts in optical clocks based on neutral divalent atoms trapped in optical lattices. Zinc and cadmium atoms have one of the smallest BBR clock shifts, mitigating the largest inaccuracy in optical lattice clocks.