Optical clock and ultracold collisions with trapped strontium atoms

[ayaz]

have i understood this correctly? we can now fine tune electrons in
atoms?

-------------------------------------------------

Hyperfine Interactions

Optical clock and ultracold collisions with trapped strontium atoms
T. Zelevinsky1 , M. M. Boyd1, A. D. Ludlow1, S. M. Foreman1, S.
Blatt1, T. Ido1 and J. Ye1

(1) JILA, University of Colorado, UCB 440, Boulder, CO 80309, USA

T. Zelevinsky
Email: t...@colorado.edu

Published online: 19 June 2007

Abstract With microkelvin neutral strontium atoms confined in an
optical lattice, we have achieved a fractional resolution of better
than 5×10–15 on the 1 S 0–3 P 0 doubly forbidden 87Sr clock transition
at 698 nm. Measurements of the clock line shifts as a function of
experimental parameters indicate that the fractional uncertainties due
to systematic shifts could be reduced below 10–15. The ultrahigh
spectral resolution permitted resolving the nuclear spin states of the
clock transition at small magnetic fields, leading to measurements of
the 3 P 0 magnetic moment and metastable lifetime. In addition,
photoassociation spectroscopy was performed on the narrow 1 S 0–3 P 1
transition of 88Sr, revealing the least-bound state, and showing
promise for efficient optical tuning of the ground state scattering
length and production of cold molecules.

[Alie...@gmail.com]

On May 11, 11:17 pm, ayaz <hackedyetag...@japan.com> wrote:
> have i understood this correctly? we can now fine tune electrons in
> atoms?

Yes. Isn't it thrilling? I think it is, but then I'm a science geek
(and damn proud of it).

BTW thanks for posting material at least as interesting as what Sam
Wormley posts, especially because yo do so without my needing to
subscribe to anything to read it.

Mark L. Fergerson