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Theory of Ferromagnetism
With the help of the exclusion principle formulated by Wolfgang Pauli, Werner Heisenberg solved the mystery of ferromagnetism. This theory gave an explanation to the force aligning the electron spins, Heisenberg used this model to count spins and included interactions between nearest electrons neighbors. -
Uncertainty Principle
Werner Heisenberg was one of the key founders in quantum mechanics, and it was with the uncertainty principle that he made his contribution to quantum theory. The previous theories stated that the electron of an atom had a fixed orbit around its nucleus, but with Heisenberg’s principle, he stated that since one could not observe the orbit of the electron around the nucleus then they couldn’t exist. https://www.youtube.com/watch?v=TQKELOE9eY4 -
Theory of the Atomic Nucleus
Following the discovery of the neutron, Heisenberg worked on the theory of the atomic nucleus by developing a model of proton and neutron interaction which would later be known as the strong force. With this, he suggested that the nucleus is made up of neutrons and protons using electrons to keep them together. -
S-matrix Theory
Based on the scattering matrix, Heisenberg put out a new theory of elementary particles and was a proposal for replacing local quantum field theory as the basic principle of elementary particle physics. The S-Matrix theory contains information about scattering processes both stationary and cross-sections, as well as, the lifetimes of unstable particles.