Friday, July 08, 2011

QGP Advances

Even the famous helium-3, which can flow out of a container via capillary forces, does not count as a perfect fluid.What black holes teach about strongly coupled particles by Clifford V. Johnson and Peter Steinberg....May of Last Year.

If helium-3 is used in cooling energy containment and was to be considered within LHC, wouldn't such example be applicable as to thinking about capillary routes as holes? Energy loss attributed too?

Layman wondering.

The notion of a perfect fluid arises in many fields of physics. The term can be applied to any system that is in local equilibrium and has negligible shear viscosity η. In everyday life, viscosity is a familiar property associated with the tendency of a substance to resist flow. From a microscopic perspective, it is a diagnostic of the strength of the interactions between a fluid’s constituents. The shear viscosity measures how disturbances in the system are transmitted to the rest of the system through interactions. If those interactions are strong, neighboring parts of the fluid more readily transmit the disturbances through the system (see figure 1). Thus low shear viscosities indicate significant interaction strength. The ideal gas represents the opposite extreme—it is a system with no interactions and infinite shear viscosity.

Perfect fluids are easy to describe, but few substances on Earth actually behave like them. Although often cited as a low-viscosity liquid, water in fact has a substantial viscosity, as evidenced by its tendency to form eddies and whorls when faced with an obstacle, rather than to flow smoothly as in ideal hydrodynamics. Even the famous helium-3, which can flow out of a container via capillary forces, does not count as a perfect fluid. What black holes teach about strongly coupled particles

The interesting thing for me as a layman  was about the theoretic in String Theory research is the idea of pushing perspective back in terms of the Microseconds. So for me it was about looking at collision processes and see how these may be applied to cosmological data as we look out amongst the stars.

At the recent seminar, the LHC’s dedicated heavy-ion experiment, ALICE, confirmed that QGP behaves like an ideal liquid, a phenomenon earlier observed at the US Brookhaven Laboratory’s RHIC facility. This question was indeed one of the main points of this first phase of data analysis, which also included the analysis of secondary particles produced in the lead-lead collisions. ALICE's results already rule out many of the existing theoretical models describing the physics of heavy-ions.
See: 2010 ion run: completed!

This is an important development in my view and I have been following for some time. The last contention in recognition for me was determinations of "the initial state" as to whether a Gas or a Fluid. How one get's there. This is phenomenologically correct as to understanding expressions of theoretic approach and application. Don't let anyone tell you different.

While we understand Microscopic blackholes quickly dissipate, it is of great interest that if such high energy collision processes are evident in our recognition of those natural processes, then we are faced with our own planet and signals of faster then light expressions through the mediums of earth?We have created many backdrops (Calorimeters) experimentally for comparisons of energy expressions. ICECUBE.

It is a really interesting story about the creation of our own universe in conjunction with experimental research a LHC

Our work is about comparing the data we collect in the STAR detector with modern calculations, so that we can write down equations on paper that exactly describe how the quark-gluon plasma behaves," says Jerome Lauret from Brookhaven National Laboratory. "One of the most important assumptions we've made is that, for very intense collisions, the quark-gluon plasma behaves according to hydrodynamic calculations in which the matter is like a liquid that flows with no viscosity whatsoever."

Proving that under certain conditions the quark-gluon plasma behaves according to such calculations is an exciting discovery for physicists, as it brings them a little closer to understanding how matter behaves at very small scales. But the challenge remains to determine the properties of the plasma under other conditions.

"We want to measure when the quark-gluon plasma behaves like a perfect fluid with zero viscosity, and when it doesn't," says Lauret. "When it doesn't match our calculations, what parameters do we have to change? If we can put everything together, we might have a model that reproduces everything we see in our detector." See:Probing the Perfect Liquid with the STAR Grid


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