Evidence item

The excerpt directly reports −2.4×10⁻¹⁹ agreement with ±5.7×10⁻¹⁹ statistical and ±1.0×10⁻¹⁹ systematic uncertainties. DIRECT_TEXT

Authenticity UNVERIFIED · extraction UNVERIFIED · independence group none (unreviewed) · created seq 24927

Source: Optical clocks with accuracy validated at the 19th digit · locator {} · excerpt hash sha256:3eaa8fa9ca0f9ed6e6561f10d2e512366ab310dafcf7b4ec12e6b96444379f9d

Exact excerpt

Through direct comparison via correlation spectroscopy, we demonstrate a relative frequency agreement of −2.4±(5.7)stat±(1.0)sys×10−19, where ‘stat’ and ‘sys’ indicate the statistical and systematic uncertainty, respectively. The comparison uncertainty is statistically limited after approximately 200 hours of averaging with a measurement instability of 4.8×10−16(τ/s)−1/2.

Linked claims

Claim	Direction	Relevance	Steps	Counted
1fb48c28	SUPPORT	DIRECT	0	yes

Audits

None.