quantum mechanics
US /ˈkwɑːntəm mɪˈkænɪks/
UK /ˈkwɑːntəm mɪˈkænɪks/
1.
the branch of mechanics that deals with the mathematical description of the motion and interaction of subatomic particles, incorporating the concepts of quantization of energy, wave-particle duality, and the uncertainty principle
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Quantum mechanics is essential for understanding the behavior of electrons in atoms.
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Many physicists are studying advanced topics in quantum mechanics.