[time-nuts] IEEE Spectrum - Dec 2017 - article on chip-scale atomic frequency reference

[Wayne (gmail)]

https://www.google.com/amp/s/spectrum.ieee.org/semiconductors/materials/to-build-the-worlds-smallest-atomic-clock-trap-a-nitrogen-atom-in-a-carbon-cage.amp.html

> On Dec 8, 2017, at 10:38 AM, Ulrich Rohde via time-nuts <time-nuts at febo.com> wrote:
> 
> Impressive, Ulrich 
>  
> In a message dated 12/8/2017 12:41:23 PM Eastern Standard Time, tom.n5eg at gmail.com writes:
> 
>  
> There's an interesting article in the December 2017 issue of IEEE Spectrum.
> 
> Researchers at Oxford U. have fabricated an atomic reference based on
> a single nitrogen molecule inside a 60-atom carbon sphere ("Fullerene").
> The cage of carbon isolates the nitrogen from external electric fields,
> and they've developed a method to also isolate it from external magnetic
> fields.
> 
> They have not incorporated the material into a working standard, but have
> licensed the chemical fabrication technology to at least one manufacturer.
> The idea is to make a chip-scale atomic frequency reference.
> 
> -- Tom, N5EG
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