Unitarity
Defined in 2 lectures. Each definition is in that lecture's terms.
Definitions are written by AI from each lecture’s transcript. The time opens the lecture where the lecturer explains it.
- The condition that quantum mechanical probabilities sum to one, represented by off-shell virtual particle contributions adding up to zero.10:53Scattering Amplitudes + Dualities at Infinity: Part 1Nima Arkani-Hamed · Institute for Advanced Study
- The quantum equivalent of reversibility where past states can always be uniquely reconstructed from future states without losing information.