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CPT theorem

noun

  1. the proposition that all the laws of physics are unchanged by the combined operations of charge conjugation (C), space inversion (P), and time reversal (T).


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Example Sentences

This supports scientist's models for how antimatter should behave. Some of the basic rules of physics predict that antihydrogen and hydrogen would emit the same light spectra — including Einstein's theory of special relativity, which states that light is the fastest moving thing in the universe; the Standard Model, which explains how elementary particles interact; and something called Charge, Parity, and Time Reversal symmetry, or the CPT theorem, which says that energy levels in matter and antimatter should be the same.

The measurements were performed at cyclotron frequencies of 29.6 megahertz, so our result shows that the CPT theorem holds at the atto-electronvolt scale.

From Nature

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