Highly-charged ions for atomic clocks, quantum information, and search   for $\alpha$-variation
  We propose 10 highly-charged ions as candidates for the development of next generation atomic clocks, quantum information, and search for $\alpha$-variation. They have long-lived metastable states with transition frequencies to the ground state between 170-3000 nm, relatively simple electronic structure, stable isotopes and high sensitivity to $\alpha$-variation (e.g., Sm$^{14+}$, Pr$^{10+}$, Sm$^{13+}$, Nd$^{10+}$). We predict their properties crucial for the experimental exploration and highlight particularly attractive systems for these applications. 
M. S. Safronova, V. A. Dzuba, V. V. Flambaum, U. I. Safronova, S. G.   Porsev, and M. G. Kozlov
physics.atom-ph physics.optics quant-ph