Beschrijving
The great physicist Feynman stated 1982 that classical computers are not capable to simulate quantum systems. A classical computer must keep track of a number of variables which grows exponentially with the dimension of the considered system. In the context of complexity theory this cannot be done with efficient effort. Even for the simulation of a few hundred atoms, the information to be stored would exceed the number of all atoms in the universe. Feynman concluded: \
