The hot soup of free quarks and gluons that existed in the very early
universe, and a state of matter that physicists have been trying to
re-create amid high-energy nuclear collisions, QGP is actually not
a superfluid, as the original version of Update
681 erroneously suggested.
According to University of Washington physicist Laurence Yaffe (206-543-3902,
email@example.com), QGP is actually a normal, conducting fluid.
It has viscosity, eliminating it from the list of superfluids. It is
somewhat electrically resistive, precluding it from being a superconductor.
Yaffe and coworkers recently performed calculations of several QGP
fluid properties from first principles (P. Arnold, G. D. Moore and
L. G. Yaffe, Journal of High Energy
Physics, 17 June 2003 and 14 February 2003).
Still, observations of high-density quark matter produced thus far
at Brookhaven's RHIC accelerator suggest that QGP might prove to be
the most ideal regular fluid observed in nature, according to Ohio
State nuclear theorist Ulrich Heinz (614-688-5363, firstname.lastname@example.org).
The viscosity of the RHIC matter appears to be exceedingly low, and
it redistributes its heat ("rethermalizes") extremely quickly. This
near-ideal regular fluid behavior should greatly facilitate comparisons
between theory and experimental observations of QGP, once its presence
is confirmed at RHIC.