Quantum field theory
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In theoretical pheesics, quantum field theory (QFT) is the theoretical framewirk for constructin quantum mechanical models o subatomic pairticles in pairticle pheesics an quasipairticles in condensed matter pheesics. A QFT treats pairticles as excitit states o the unnerlyin pheesical field, sae thir are cried field quanta.
