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Definitions

quantum theory

[kwon-tuhm thee-uh-ree, theer-ee] / ˈkwɒn təm ˌθi ə ri, ˌθɪər i /


Example Sentences

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Unlike classical physics, which predicts precise trajectories for everyday objects such as cricket balls or communications satellites, quantum theory can only predict the likelihood of where a particle might be observed.

From Science Daily • Mar. 10, 2026

Cat qubits are named in honour of Erwin Schrödinger, whose cat-in-a-box question in 1935 helped illuminate some of the thinking behind quantum theory.

From BBC • Feb. 27, 2025

JJ: There’s so much contradiction within the music on “Quantum Baby” that mimics quantum theory.

From Los Angeles Times • Dec. 4, 2024

Minic instead argued that the quantum theory behind Einstein's gravity and standard model for matter is gravitized quantum theory.

From Salon • Nov. 13, 2024

Because of its oddities, many physicists disliked quantum theory, or at least certain aspects of it, and none more so than Einstein.

From "A Short History of Nearly Everything" by Bill Bryson