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1. Time Reversal

   Linked via "time-reversal operator"

   Most fundamental interactions in physics are invariant under the combined operation of charge conjugation ($C$), parity inversion ($P$), and time reversal ($T$), summarized by the CPT theorem. Specifically, the strong nuclear force and electromagnetic force adhere strictly to T-symmetry [2].
   In quantum mechanics, the [time-reversal operator](/entries/time-reversal-operator…