> ## Content Index
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# We Were Wrong About the Quantum Eraser!
- URL: https://www.cascadepbs.org/show/pbs-space-time/episode/we-were-wrong-about-the-quantum-eraser-4f0bsn/
- Published: 2025-12-23T21:15:50.000Z
- Updated: 2025-12-31T17:30:12.000Z
- Description: Does quantum mechanics allow the future to retroactively influence the past or not?
- Author: Cascade PBS Staff
- Tags: PBS Space Time, Season 11, Episode 14, #ZZZ_Episode_55da61ed-0bd4-45fe-8d3f-715d6d641e8e, #episode, #ZZZ_Show_ae70f836-13b6-4c9d-b61f-99f7b8bc29eb, #v1.16

Does quantum mechanics allow the future to retroactively influence the past, as in the infamous delayed choice quantum eraser experiment? How about we get an actual quantum physicist--who many of you already know--to show us how to do this experiment at home, and hopefully set this matter to rest.