Counterfactual Quantum Computation is Really Weird

From the creator

To try out our new course (and many others on math and science), go to https://brilliant.org/sabine. You can get started for free, and the first 200 will get 20% off the annual premium subscription. 💌 Sign up for my weekly science newsletter. It's free! ➜ http://sabinehossenfelder.com/ 👉 Support me on Patreon ➜ https://www.patreon.com/Sabine 📖 My new book "Existential Physics" is coming out in August ➜ http://existentialphysics.com/ 🔗 Join this channel to get access to perks ➜ https://www.youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join Events that could have happened but didn't, so called counterfactual events, are but a mind-game in our reality. In quantum reality, however, they are quite real indeed. In this video I explain how this can be used to do a computation without actually running the computer. This is called "counterfactual computation" (or "counterfactual quantum computation" more specifically). The key papers which I mention are: Counterfactual Computation Graeme Mitchison and Richard Jozsa https://royalsocietypublishing.org/doi/10.1098/rspa.2000.0714 Counterfactual Quantum Computation through Quantum Interrogation Hosten et al https://www.nature.com/articles/nature04523 The two papers I mention as further developments at the end are: Counterfactual Quantum Cryptography Tae-Gon Noh https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.103.230501 Counterfactual universal quantum computation Zhu Cao https://journals.aps.org/pra/abstract/10.1103/Phy

Published 2022-08-06 · Watch on YouTube ↗
Availability and playback restrictions are controlled by the original channel.