Table 6 Projected systematic uncertainties for a CaF clock using a 696 nm lattice
From: Measuring the stability of fundamental constants with a network of clocks
Effect | Conditions | Fractional uncertainty |
|---|---|---|
Lattice frequency | \(\delta f_{\text{latt}} < 1\text{ MHz}\) | 5 × 10−19 |
Zeeman shift | \(B < 0.1~\mu \text{T}\), asymmetry < 1% | 7 × 10−18 |
DC Stark shift | E<10 mV cm−1 | 7 × 10−18 |
Blackbody shift | δT<250 mK at 300 K | 10−18 |
Doppler shift | \(T=5~\mu \text{K}\) | 4 × 10−21 |
Raman laser | 696 nm & 725 nm | <9 × 10−22 |