exchange degeneracy

exchange degeneracy

[iks′chānj dē′jen·ə·rə·sē] (particle physics) Coincidence of two Regge trajectories for particles having the same quantum numbers (except for parity, charge parity, and G parity) where one would have expected separate trajectories for alternate Regge recurrences. (quantum mechanics) An exchange process that leads back to the original configuration. Also known as exchange symmetry.