# Definition:Quantum Mechanics

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## Contents

## Definition

**Quantum mechanics** is the branch of physics concerned with the behaviour of matter at the smallest scale accessible to observation.

## Also known as

**Quantum mechanics** is also known as **quantum physics**.

It is not clear whether there is actually a qualitiative difference between the two terms.

## Also see

- Results about
**quantum mechanics**can be found here.

## Sources

- 1978: A.P. French and Edwin F. Taylor:
*An Introduction to Quantum Physics*... (next): Preface - 2014: Christopher Clapham and James Nicholson:
*The Concise Oxford Dictionary of Mathematics*(5th ed.) ... (previous) ... (next): Entry:**quantum mechanics**