Repulsion binds atoms

Repulsion binds atoms (Jun 15)
http://physicsweb.org/article/news/10/6/8

Physicists in Austria have created a new type of stable bound state made
from two atoms that repel each other. This counterintuitive result âEUR"
normally we think that two objects need to attract each other to stick
together âEUR" was obtained by a team led by Johannes Hecker Denschlag
and Andrew Daley at the University of Innsbruck by trapping ultracold
rubidium atoms in an optical lattice. The work could have implications
for making quantum computers and to study bound states on a fundamental
level. The experiment also shows how optical lattices can be used to
investigate many-body phenomena that are hard to observe in other
systems (Nature 441 853).

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