282 citations · 1k across the 15 of their papers we have counts for
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physics.atom-ph2004★ 78 cited
The optical calcium frequency standards of PTB and NIST
U. Sterr, C. Degenhardt, H. Stoehr +7
We describe the current status of the Ca optical frequency standards with laser-cooled neutral atoms realized in two different laboratories for the purpose of developing a possible…
physics.atom-ph2004★ 282 cited
New limit on the present temporal variation of the fine structure constant
E. Peik, B. Lipphardt, H. Schnatz +3
The comparison of different atomic transition frequencies over time can be used to determine the present value of the temporal derivative of the fine structure constant alpha in a…