Mark,
Nice find! It should reveal sub harmonics for manipulating h
but regarding f/h it brings up an interesting question, does the spectrum
broadening mean the fractional orbits are at different frequencies, and if so
are they nice orbital steps ½ to 137? Or is the shift linear?
Fran
From: MarkI-ZeroPoint [mailto:[email protected]]
Sent: Tuesday, June 18, 2013 3:29 AM
To: [email protected]
Subject: EXTERNAL: [Vo]:FYI: Frequency of Hydrogen's 1S-2S transition photon
emission determined to within 11 Hertz
http://physics.aps.org/synopsis-for/10.1103/PhysRevLett.110.230801
-----------------------------------------
Light emission from hydrogen atoms allows spectacularly precise confirmation of
quantum-mechanical laws. But theorists have yet to fully reconcile those laws
with relativity, the other major foundation of modern physics. In Physical
Review Letters, a multilaboratory collaboration reports improved hydrogen
measurements that place limits on how big one possible correction to relativity
could be.
Researchers at the Max Planck Institute for Quantum Optics in Garching,
Germany, have pioneered methods that connect optical emission frequencies to
the much lower radio frequencies of atomic clocks. But the best atomic clocks,
based on a fountain of cesium atoms, are in distant labs such as the Federal
Physical-Technical Institute (PTB) in Braunschweig, and can't be easily moved.
So the two labs synchronized their setups by sending light signals back and
forth over a 920-km-long optical fiber. The connection allowed them to express
the 1S-2S transition frequency in terms of the international standard
definition of the second as
2,466,061,413,187,018 hertz, with an uncertainty of just 11 hertz.
The researchers exploited the unprecedented precision to look for variations of
the frequency over a year. Such variations would show that the frequency
depends on the motion of the Earth around the Sun, which is forbidden by
relativity. But the team estimates that parameters that quantify that
dependence can be no larger than a few parts in 10^11. One of the parameters is
slightly different from zero, but even more precise measurements will be needed
to determine if this difference is truly significant. - Don Monroe
---------------------------------------------
Will a photon of that same frequency cause a 1S-2S transition???
Now you have an exact frequency with which to manipulate the H atom...
-Mark Iverson
