# 5th state of matter

by lakshmi
Tags: matter, state
 P: 36 what is the 5th state of matter can aybody explain it
 P: 11 You must know the 3 states of matter: liquid,solid,gaz, but at hight temerature, you can also find a state called plasma(electrons are free) The fifth state of matter you're talking about might be the QGP (Quarks and GLuon PLasma). Scientists believe that QGP is a state where quarks are free (T = 170 Mev and epsilon = 3 GeV per fm^3), as during the first second of our universe. Many experiments are runing now to prove its existence in Berkeley and Geneva... I hope it's answers your question ... Regards
 PF Patron Sci Advisor Emeritus P: 16,094 He might be talking about Bose-Einstein condensate.
P: 2,824

## 5th state of matter

Unfortunately, it is rather difficult to guess !
If you please lakshmi, be more specific.
 P: 60 I did a 2nd year undergrad uni course in statistical mechanics this semester, and we touched on Bose-Einstein condensation, just by deriving certain temperatures etc. We were told that the first experimental evidence of B-E condensation was in 1995 where Rubidium atoms were cooled to something like 4x10^-3 K, by using "laser traps" How does this work?
 P: 608 Well, basicly you have lasers that hit a group of atoms from all sides and inhibit their movement, effectively dropping their temperature.
P: 13
 Quote by rayveldkamp I did a 2nd year undergrad uni course in statistical mechanics this semester, and we touched on Bose-Einstein condensation, just by deriving certain temperatures etc. We were told that the first experimental evidence of B-E condensation was in 1995 where Rubidium atoms were cooled to something like 4x10^-3 K, by using "laser traps" How does this work?
Actually, it's much colder- something like $$10^{-7} K$$ is more typical.

As for how they did it, take a look at this site. which provides an easy introduction.
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