Precision Measurement of the Quadrupole Transition Matrix Element in a Single Trapped ${}^{40}$Ca${}^{+}$

H. Shao, Y. Huang, H. Guan +3

We report the first experimental determination of the $4s{}^2{S}_{1/2}$ $\leftrightarrow$ $3d{}^2{D}_{5/2}$ quadrupole transition matrix element in ${}^{40}$Ca${}^{+}$ by measuring t…