Iwo Białynicki-Birula

Iwo Białynicki-Birula (born 14 June 1933 in Warsaw ) is a Polish theoretical physicist. He works as a professor at the Center for Theoretical Physics, Polish Academy of Sciences, an institution that he initiated in 1980. He is also a professor emeritus at the Faculty of Physics, University of Warsaw. He holds a full professorship in physics.

He received the Prize of the Foundation for Polish Science in mathematical, physical and engineering sciences in 2014 and the Smoluchowski Medal of the Polish Physical Society in 2021. In 2023 for his overall lifetime fundamental contributions to the Quantum Mechanics, especially for constructing the counterexample to the Feynman theorem about the gauge invariance of the unrenormalized transition amplitudes generated by his diagrams, construction of the nonlinear quantum mechanics and for the discovery of the Trojan Wave Packets he was granted the Wigner Medal awarded for the first time ever outside the strict Group Theory. He is a full member of the Polish Academy of Sciences.

He published multiple works on field theory, quantum electrodynamics and renormalization theory.