Probability current

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Notion

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Science and technology

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What Wikipedia says

In quantum mechanics, the probability current (sometimes called probability flux) is a mathematical quantity describing the flow of probability. Specifically, if one thinks of probability as a heterogeneous fluid, then the probability current is the rate of flow of this fluid.

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