Werner Karl Heisenberg Werner Karl Heisenberg December 5,1901- February1,1976) He invented matrix mechanics the first formalization of quantum mechanics in 1925 His uncertainty principle, discovered in 1927, states that the simultaneous determination of two paired quantities, for example the position and momentum of a particle, has an unavoidable uncertainty. Together with Bohr he formulated the Copenhagen interpretation of quantum mechanICSWerner Karl Heisenberg Werner Karl Heisenberg (December 5, 1901 – February 1, 1976) He invented matrix mechanics, the first formalization of quantum mechanics in 1925. His uncertainty principle, discovered in 1927, states that the simultaneous determination of two paired quantities, for example the position and momentum of a particle, has an unavoidable uncertainty. Together with Bohr, he formulated the Copenhagen interpretation of quantum mechanics