Abstract
Quantum Field Theory (QFT) stands as one of the most foundational frameworks in modern theoretical physics, unifying quantum mechanics with special relativity to describe subatomic particles and their interactions. Over recent decades, significant advancements have deepened our understanding of quantum phenomena, spurred new mathematical tools, and expanded QFT's applications beyond particle physics into areas like condensed matter, cosmology, and quantum computing. This article surveys these recent developments, discusses key theoretical frameworks such as renormalization, gauge theory, and effective field theories, and explores the evolving interface between QFT and technological innovation.
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