Physics

Scientists reveal the structure of the universe’s first fluid

How the science connects

Particle physicsBig BangQuark-gluon plasma

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In the first microseconds after the Big Bang, matter existed as quark-gluon plasma, an extremely hot fluid at trillion-degree temperatures where quarks and gluons moved at near-light speeds before condensing into stable protons and neutrons. Scientists are working to understand the precise structure and properties of this primordial state of matter that existed before ordinary atomic particles formed. This research helps reconstruct the conditions of the early universe and the fundamental behavior of matter under extreme conditions.


Understanding quark-gluon plasma provides insight into the fundamental forces and particles that governed the universe's first moments, helping physicists test theories about matter's most basic building blocks. This knowledge advances our understanding of quantum chromodynamics and the strong nuclear force that holds atomic nuclei together.


In the first fraction of a second following the Big Bang, matter existed as a trillion-degree plasma of quarks and gluons—subatomic particles that zinged around at close to the speed of light. This roiling soup lasted for just a few microseconds before the particles coalesced into more stable protons and neutrons.

Source: Pinning down the structure of quark-gluon plasma, the universe's first fluid