Propagator

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given period of time, or to travel with a certain energy and momentum.

Excerpt from the Wikipedia article “Propagator”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Joel Holdsworth (Joelholdsworth), Public domain, via Wikimedia Commons.