Quantum Physics – Niels Bohr Institute - University of Copenhagen

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Quantum Physics

Quantum physics or quantum mechanics is a branch of physics that concerns the properties of substances at nuclear level.

In 1913, the Danish physicist Niels Bohr developed his pioneering theory about the spectral lines of the hydrogen atom by assuming that energy came in quanta. This means that a quantum is the smallest conceivable quantity of energy in light waves.

Quantum mechanics developed into what is known as "the Copenhagen interpretation". This great breakthrough in the understanding of the structure of atoms made it possible to acquire deeper insight into the properties of substances, and it opened up new perspectives in wide fields of natural science.

The exploration of light and the quantum properties of atoms is one of the most active fields of research in modern physics. This is cutting-edge frontier research in which a brand-new world is being explored. In recent years, there has been extensive development of the experimental techniques that are used to manipulate quantum-mechanical states, and the groups have conducted several large-scale research projects.