Why is quantum mechanics non-local? (I wish someone had told me this 20 years ago.)

Video Description

If you'd like to learn more about quantum mechanics, use our link https://brilliant.org/sabine - You can get started for free, and the first 200 will get 20% off the annual premium subscription. Last year, the Nobel Prize in physics was awarded to three physicists who allegedly found that the universe is not locally real. But what does this mean? What are the two types of non-locality? And what did Einstein's have to do with it? That's what we'll talk about today. Some examples for models that violate measurement independence are here: C. H. Brans, International Journal of Theoretical Physics 27, 219 (1988) https://link.springer.com/article/10.1007/BF00670750 T. N. Palmer, Proc. Roy. Soc. A, 451, 585-608 (1995) https://arxiv.org/abs/quant-ph/9505025 J. Degorre, S. Laplante, J. Roland, PRA 72, 062314 (2005) https://arxiv.org/abs/quant-ph/0507120 M. J. W. Hall, Phys. Rev. Lett. 105, 250404 (2010) https://arxiv.org/abs/1007.5518 G. S. Ciepielewski, E. Okon, D. Sudarsky https://arxiv.org/abs/2008.00631 S. Donadi, S. Hossenfelder, PRA 106, 2 (2022) https://arxiv.org/abs/2010.01327 💌 Support us on Donatebox ➜ https://donorbox.org/swtg 🤓 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/ 👉 Transcript with links to references on Patreon ➜ https://www.patreon.com/Sabine 📩 Sign up for my weekly science newsletter. It's free! ➜ https://sabinehossenfelder.com/newsletter/ 🔗 Join this channel to get access to perks ➜ https://www.youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join 🖼️ On instagram ➜ https://www.instagram.com/sciencewtg/ 00:00 Introduction 00:39 Two types of Non-Locality 05:32 Quantum Mechanics 12:32 Local Causality 16:34 Measurement Independence 19:55 Bell's Theorem 22:39 Summary 23:32 Brilliant Sponsorship #science #physics #quantum