# quantum theory

*quantum theory*on Thesaurus.com

any theory predating quantum mechanics that encompassed Planck's radiation law and a scheme for obtaining discrete energy states for atoms, such as the Bohr model.

any theory that treats certain phenomena by the methods of quantum mechanics: a quantum theory of gravitation.

## Origin of quantum theory

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

## How to use quantum theory in a sentence

For that reason, researchers have developed a framework to describe

*quantum theory*in combination with general relativity.*quantum theory*explains the small stuff, where matter and energy divide into infinitesimal particles.In that way, it incorporates both classical physics and

*quantum theory*to explain the most general range of phenomena yet.The 6 Smartest Ideas From Stephen Hawking's New Book | Joshua Robinson | September 10, 2010 | THE DAILY BEAST

## British Dictionary definitions for quantum theory

a theory concerning the behaviour of physical systems based on Planck's idea that they can only possess certain properties, such as energy and angular momentum, in discrete amounts (quanta). The theory later developed in several equivalent mathematical forms based on De Broglie's theory and on the Heisenberg uncertainty principle: See wave mechanics

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Scientific definitions for quantum theory

Any of various theories that makes use of the assumptions, principles, and laws of quantum mechanics.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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