Hamilton, R.Roberts, B.M.Scholten, S.K.Locke, C.Luiten, A.N.Ginges, J.S.M.Perrella, C.2023-06-202023-06-202023Physical Review Applied, 2023; 19(5):054059-1-054059-102331-70192331-7019https://hdl.handle.net/2440/138753The interaction between light and an atom causes perturbations in the atom’s energy levels, known as the light shift. These light shifts are a key source of inaccuracy in atomic clocks, and can also deteriorate their precision. We present a study of light shifts and associated dynamic polarizabilities for a two-photon atomic clock based on the 5S1/2–5D5/2 transition in rubidium-87 over the range 770–800 nm. We determine experimental and theoretical values for a magic wavelength in this range and the electric dipole (E1) matrix element for the 5P3/2–5D5/2 transition. We find a magic wavelength of 776.179(5) nm (experimental) and 776.21 nm (theoretical) in the vicinity of the 5P3/2–5D5/2 resonance, and the corresponding reduced E1 matrix element 1.80(6)ea0 (experimental) and 1.96(15)ea0 (theoretical). These values resolve a previous discrepancy between theory and experiment.en© 2023 American Physical SocietyAtomic, optical & lattice clocks; Light-matter interaction; Photonics; Stark effect; Time & frequency standardsJournal article10.1103/physrevapplied.19.0540592023-06-20644444Scholten, S.K. [0000-0002-5976-8300]Luiten, A.N. [0000-0001-5284-7244]Perrella, C. [0000-0002-6140-9323]