Tyutin

Tyutin is a Russian surname. The most prominent bearer is Igor V. Tyutin, a Russian theoretical physicist known for his role in the development of BRST symmetry in gauge theories. In the 1970s, Tyutin contributed to a formalism that, together with work by Becchi, Rouet, and Stora, underpins the BRST approach to quantization.

BRST symmetry is a global fermionic symmetry used to quantize gauge theories. It introduces ghost fields and a nilpotent BRST charge, enabling gauge fixing without breaking unitarity or renormalizability. The BRST invariance provides a robust mathematical framework for analyzing constrained systems and for proving the consistency of gauge theories in quantum field theory and related areas.

The surname Tyutin originates in Russia and is typically transliterated from the Cyrillic Тюутин. It is most commonly encountered in Russian-speaking contexts, though bearers of the name appear in scientific and academic settings around the world.