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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

The Born rule bridges the math of quantum theory to the outcomes of experiments, which makes the field a legitimate scientific discipline in the first place.

From Salon • Nov. 13, 2024

To understand the big bang, physicists must marry quantum theory with relativity.

From "Zero: The Biography of a Dangerous Idea" by Charles Seife