Quantum Field Theory (QFT) extends quantum mechanics by treating particles as excitations of underlying fields. It provides a unified framework for describing particle creation, annihilation, and interactions. QFT combines quantum mechanics with special relativity and is fundamental to high-energy physics. It underlies the Standard Model of particle physics, which explains electromagnetic, weak, and strong interactions. Quantum field theory introduces concepts such as virtual particles, gauge symmetry, and renormalization. It enables precise predictions verified by particle accelerator experiments. Beyond particle physics, QFT influences condensed matter physics and cosmology. As a cornerstone of modern theoretical physics, QFT offers the most accurate description of fundamental interactions known today.
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