Time keeping and searching for new physics using metastable states of Cu, Ag, and Au
Time keeping and searching for new physics using metastable states of Cu, Ag, and Au
We study the prospects of using the electric quadrupole transitions from the ground states of Cu, Ag and Au to the metastable state $^2{\rm D}_{5/2}$ as clock transitions in optical lattice clocks. We calculate lifetimes, transition rates, systematic shifts, and demonstrate that the fractional uncertainty of the clocks can be …