Quiet amazing technical feat!
Brent
On 10/18/2021 11:02 AM, John Clark wrote:
In 2 new papers researchers report the development of an atomic
clock that would be off by just one second after 4 trillion years, the
universe is only 13.8 billion years old. When they raised this new
clock up by a distance of only 1 millimeter they could measure the
increase in clock speed due to it being one millimeter further from
the Earth center and thus in a weaker gravitational field, and this
change in clock speed agreed entirely with Einstein's general relativity.
Resolving the gravitational redshift within a millimeter atomic sample
<https://arxiv.org/abs/2109.12238>
High precision differential clock comparisons with a multiplexed
optical lattice clock <https://arxiv.org/abs/2109.12237>
John K Clark See what's on my new list at Extropolis
<https://groups.google.com/g/extropolis>
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