Introduced to describe particle collisions in high-energy physics without needing to account for intermediate, unobservable states, a method still relevant in modern particle physics.
Werner Heisenberg (1901–1976) was a central architect of modern physics whose work fundamentally reshaped our understanding of reality. One hundred years after his landmark 1925 breakthrough, his legacy remains a cornerstone of quantum science and technology. 100 years Werner Heisenberg: works and impact
Perhaps his most famous discovery, this principle states that it is physically impossible to know both the exact position and momentum of a particle simultaneously. The more accurately one is measured, the less accurately the other can be known. 100 years Werner Heisenberg: works and impact