quantum field theory


: 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

Example Sentences

Recent Examples on the Web Flip Tanedo points out that Brian Hill's transcription of Sidney Coleman's lectures on quantum field theory have finally been LaTeXed (pdf). Sean Carroll, Discover Magazine, 24 Mar. 2011 Many physicists hope that the problem of the gravitational influence of zero-point energy can be resolvable within the framework of quantum field theory, possibly in a theory of quantum gravity. The Physics Arxiv Blog, Discover Magazine, 12 Sep. 2022 Crucially, the quantum field theory describing D-branes was strongly coupled: particles and fields in the theory interacted strongly with each other. Anil Ananthaswamy, Scientific American, 30 Nov. 2022 Feynman integrals have plagued particle theorists since the rise of quantum field theory in the mid–20th century. Byadrian Cho, science.org, 30 Nov. 2022 It is based on other experimental results (for example, from BaBar and the KLOE project in Italy) that do not agree with simulations of quantum field theory that were recently performed on supercomputers. Andreas Crivellin, Scientific American, 23 Oct. 2022 This proved that creating matter from nothing is indeed possible, a theory first proposed by Julian Schwinger, one of the founders of quantum field theory. Joshua Hawkins, BGR, 18 Sep. 2022 Electromagnetic force was well explained by quantum field theory, which pictured attraction or repulsion as an exchange of massless particles—photons—able to travel across unlimited distances. Andrew Crumey, WSJ, 3 June 2022 Adami sees the new research as an elegant synthesis of several different disciplines, including classical physics, atomic physics and quantum field theory. Joanna Thompson, Scientific American, 20 May 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quantum field theory.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1948, in the meaning defined above

Time Traveler
The first known use of quantum field theory was in 1948

Dictionary Entries Near quantum field theory

Cite this Entry

“Quantum field theory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quantum%20field%20theory. Accessed 5 Feb. 2023.

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