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Table 1 Summary of bounds on drifts of the electromagnetic fine structure constant
α
and indirect limits from searches for equivalence-principle-violating forces in the context of the model considered in [
146
,
147
]
From:
Measuring the stability of fundamental constants with a network of clocks
Measurement type
|
d
ln(
α
)/
dt
|/yr
Reference
Yb
+
clocks
∼
10
−18
[
20
]
Oklo phenomenon
∼
10
−17
[
154
–
157
]
Meteorite dating
∼
10
−16
[
158
]
MICROSCOPE (indirect limits)
∼
10
−17
–10
−23
[
14
,
137
,
138
]
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