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# What Happens During a Quantum Jump?
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/what-happens-during-a-quantum-jump-v59iaj/
- Published: 2024-04-02T23:12:18.000Z
- Updated: 2025-08-21T13:46:33.000Z
- Description: Transitions of quantum systems have always defied observation...until now.
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 7, Episode 4, #ZZZ_Episode_22aa11cd-33ab-4771-85ed-1ebfaf9acde0, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

Since the very beginning of quantum mechanics, a debate has raged about how to interpret its bizarre predictions. And at the heart and origin of that debate is the quantum jump or quantum leap - the seemingly miraculous and instantaneous transitions of quantum systems that have always defied observation or prediction. At least, until now.