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Nature 458, 975-976 (23 April 2009) | doi:10.1038/458975a; Published online 22 April 2009
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Quantum chemistry: The little molecule that could
Chris H. Greene1
Abstract
The creation of diatomic molecules bound by roaming electrons that allow a huge internuclear distance is some achievement. It opens the door to further experimental exploitation of the principles involved.
Decades ago, chemists and physicists identified the various types of molecular bonding that are possible, including the standard ionic and covalent schema presented today in every introductory chemistry text. In the meantime, most practitioners of quantum chemistry have meandered on to larger species with the goal of predicting and elucidating the properties of huge molecules containing dozens, hundreds or even thousands of atoms.
- Chris H. Greene is in the Department of Physics and JILA, University of Colorado, Boulder, Colorado 80309-0440, USA.
Email: chris.greene@colorado.edu
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Bound macrodimers have now been directly observed for the first time. Macrodimers comprise two Rydberg atoms with a separation as large as 9m. The unique properties of macrodimers mean that they enable new experiments for investigating ultracold gases. Bound macrodimers have now been directly observed for the first time. Macrodimers comprise two Rydberg atoms with a separation as large as 9m. The unique properties of macrodimers mean that they enable new experiments for investigating ultracold gases.Nature Physics Article (01 Aug 2009)

