New spin on salt
Chicago scientist Thomas Rosenbaum demonstrates
entanglement, a phenomenon that leaves classical physics out in
Physicist Thomas Rosenbaum has long sensed
something strange about a salt called lithium holmium yttrium tetrafluoride
(lithium holmium fluoride for short). His lab has been experimenting
with the rose-hued crystals for 15 years, and no matter how low
the researchers drop the temperature—even to within a few
thousandths of a degree of absolute zero, or –459°F, theoretically
the temperature at which all molecular motion ceases—the salt
won’t freeze. “That’s a very peculiar behavior.
There must be some hidden variable to explain it,” says Rosenbaum,
the John T. Wilson distinguished service professor in physics, the
James Franck Institute, and the College—and also the University’s
vice president for research and for Argonne National Laboratory.
Now his team has finally solved the mystery: the material’s
atoms are “entangled,” he and Sayantani Ghosh, SM’01,
PhD’03, reported in the September 2003 Nature.
The business of spreading
Quality work and behavior may seem
like the most logical ways to earn professional prestige, but it’s
gossip that builds business reputations, says Ronald S. Burt, PhD’77,
the Hobart W. Williams professor of sociology and strategy in the
Graduate School of Business.
Medieval music unmasked
He has celebrity status in his southern
Italian birthplace, Oppido Lucano. Since 1970 a street in the town
has been known by his name. This past spring an international conference
convened in his honor, an ensemble performed his music, and the
local newspapers provided in-depth coverage. Not bad for a once-forgotten