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In physics, a quantum (pl.: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction. Quantum is a discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.
Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. Light, for example, appearing in some respects as a continuous electromagnetic wave, on the submicroscopic level is emitted and absorbed in discrete amounts, or quanta.
- The Editors of Encyclopaedia Britannica
Quantum mechanics is a fundamental theory in physics that describes the behavior of nature at and below the scale of atoms.: 1.1 It is the foundation of all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science.
Quantum is a noun that means the smallest amount or unit of something, especially energy, in physics. Learn how to use quantum in different contexts, such as quantum theory, quantum computing, and quantum information, with examples and translations.
Learn the origin, usage, and synonyms of the word quantum, which can mean a small amount of energy, a portion of a magnitude, or a principle of quantum mechanics. See examples of quantum in sentences and related phrases and articles.
Learn what quantum physics is, how it studies matter and energy at the fundamental level, and what phenomena and discoveries it reveals. Explore the origins, principles, mathematics, and observations of quantum science, and how it impacts our understanding of the world.
Learn what quantum physics is, how it explains the nature of matter and forces, and why it has some mysterious and paradoxical features. Explore the standard model, quantum field theories, entanglement, and the quest for a theory of everything.
