Gerhart Lüders (25 February 1920 – 31 January 1995) was a German theoretical physicist who worked mainly in quantum field theory and was well known for the discovery and a general proof of the CPT theorem.
In the same year, he proved the CPT theorem in the particular form that for a relativistic quantum field theory the validity of parity invariance necessarily implies the validity of CT invariance.
[1] (Wolfgang Pauli, who like John Bell formulated this theorem independently of Lüders, gave a little later a more general proof.)
With Bruno Zumino, Lüders in 1958 gave a rigorous proof of the so-called spin–statistics theorem[2][3] and once again a proof of the CPT theorem, this time from general field theoretical axioms of the relativistic quantum field theory.
He received in 1959 the physics prize of the Akademie der Wissenschaften zu Göttingen and in 1966 the Max Planck Medal.