quantum theory

noun

Definition of quantum theory

1 : a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale

Examples of quantum theory in a Sentence

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This assertion by Alice necessitates another assumption about her use of quantum theory. Wired, "A New Quantum Paradox Flags Errors in Our View of Reality," 9 Dec. 2018 Physicists need a quantum theory of gravity to understand how things that fall in black holes also get out. Natalie Wolchover, WIRED, "Space and Time Could Be a Quantum Error-Correcting Code," 6 Jan. 2019 This assertion by Alice necessitates another assumption about her use of quantum theory. Wired, "A New Quantum Paradox Flags Errors in Our View of Reality," 9 Dec. 2018 This assertion by Alice necessitates another assumption about her use of quantum theory. Quanta Magazine, "New Quantum Paradox Clarifies Where Our Views of Reality Go Wrong," 3 Dec. 2018 One disadvantage is that the universe’s mirror-image lobes meet at a singularity, a pinch in space-time that requires the unknown quantum theory of gravity to understand. Quanta Magazine, "Physicists Debate Hawking’s Idea That the Universe Had No Beginning," 6 June 2019 Or perhaps the problem lies in quantum theory itself, rather than general relativity. Steve Nadis, Discover Magazine, "We've Found Gravitational Waves. What Will We Learn From Them?," 24 May 2019 Among the attempts to unify quantum theory and gravity, string theory has attracted the most attention. Quanta Magazine, "String Theory Meets Loop Quantum Gravity," 12 Jan. 2016 When discussing quantum theory, the Institute of Physics says that a superposition is the idea that a particle can be in two places at once. David Grossman, Popular Mechanics, "Scientists Can Save Schrödinger's Cat By Predicting Quantum Jumps," 7 June 2019

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

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First Known Use of quantum theory

1912, in the meaning defined at sense 1

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Last Updated

27 Aug 2019

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The first known use of quantum theory was in 1912

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More Definitions for quantum theory

quantum theory

noun

English Language Learners Definition of quantum theory

physics : a theory in physics that is based on the idea that energy (such as light) is made of small separate units of energy

quantum theory

noun

Medical Definition of quantum theory

: a theory in physics based on the concept of the subdivision of radiant energy into finite quanta and applied to numerous processes involving transference or transformation of energy in an atomic or molecular scale

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More from Merriam-Webster on quantum theory

Spanish Central: Translation of quantum theory

Nglish: Translation of quantum theory for Spanish Speakers

Britannica.com: Encyclopedia article about quantum theory

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