HackerTube / Video
How the Quantum Eraser Rewrites the Past | Space Time | PBS Digital Studios
PBS Space Time
PBS Space Time explains the quantum eraser experiment, in which erasing which-path information appears to reverse causality in a double-slit setup. It discusses what this means for quantum mechanics.
HN recommends it as a quick introduction to the quantum eraser and delayed choice weirdness, though one commenter notes later corrections to its framing.
8 Hacker News mentions · 2017–2025