asymptotic freedom

Asymptotic freedom is a phenomenon in quantum chromodynamics, the theory describing the strong force that binds quarks and gluons inside protons and neutrons. It means that as quarks get closer together, they interact more weakly, almost behaving as if they are free. Conversely, when they are distant, their interactions become stronger, analogous to being held tightly by an invisible force. This counterintuitive behavior helps explain why quarks are never found isolated in nature but always appear in groups, forming larger particles like protons and neutrons.