quantum field theory

noun

: a theory in physics: the interaction of two separate physical systems (such as particles) is attributed to a field that extends from one to the other and is manifested in a particle exchange between the two systems

Examples of quantum field theory in a Sentence

Recent Examples on the Web

Even as physicists came to understand these particles by developing a quantum field theory (QFT) — the standard language of particle physics, in which particles are ripples of energy in fields that permeate space-time — the string theory that emerged from Veneziano’s work stuck around. —Quanta Magazine, 23 Mar. 2026

My love says most equations in quantum field theory give infinity as an answer, which is not meaningful because all infinities are the same. —Traci Brimhall, The Atlantic, 23 Nov. 2025

Quantum mechanics replaced classical mechanics, and then quantum field theory went still further. —Big Think, 12 Nov. 2025

To model these events precisely, the team turned to quantum field theory, which is a branch of physics typically used to describe interactions between elementary particles. —Sharmila Kuthunur, Space.com, 16 May 2025

Word History

First Known Use

1948, in the meaning defined above

Rhymes for quantum field theory

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