Uploaded May 2026 | Updated September 2026, 2 weeks ago
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When you try to combine quantum physics with Einstein’s theories, you quickly run into some pretty serious problems. The biggest is that causality – the order in which events occur – becomes uncertain as the rest of quantum physics. A group of physicists have leveraged that uncertainty, and are now claiming that they can send messages to the past using quantum mechanics. It’s not as crazy as it sounds. Let’s take a look.
Paper: journals.aps.org/prl/accepted/10.1103/znyd-npk5
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#science #sciencenews #physics #quantum
In this video, we examine recent headlines suggesting that sending messages into the past has become easier or even possible, drawing from a theoretical physics paper published in a top journal. While these claims might sound like a time machine is within reach, I clarify that this is a theoretical study and not an actual method for backward time travel. It's crucial for science communication to distinguish between theoretical possibilities in quantum physics and practical applications.
Take back your personal data with Incogni! Use code Sabine at the link below and get 60% off annual plans: incogni.com/sabine
When you try to combine quantum physics with Einstein’s theories, you quickly run into some pretty serious problems. The biggest is that causality – the order in which events occur – becomes uncertain as the rest of quantum physics. A group of physicists have leveraged that uncertainty, and are now claiming that they can send messages to the past using quantum mechanics. It’s not as crazy as it sounds. Let’s take a look.
Paper: journals.aps.org/prl/accepted/10.1103/znyd-npk5
👕T-shirts, mugs, posters and more: ➜ sabines-store.dashery.com
💌 Support me on Donorbox ➜ donorbox.org/swtg
👉 Transcript with links to references on Patreon ➜ patreon.com/Sabine
📝 Transcripts and written news on Substack ➜ sciencewtg.substack.com
📩 Free weekly science newsletter ➜ sabinehossenfelder.com/newsletter
👂 Audio only podcast ➜ open.spotify.com/show/0MkNfXlKnMPEUMEeKQYmYC
🔗 Join this channel to get access to perks ➜
youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join
📚 Buy my book ➜ amzn.to/3HSAWJW
#science #sciencenews #physics #quantum
In this video, we examine recent headlines suggesting that sending messages into the past has become easier or even possible, drawing from a theoretical physics paper published in a top journal. While these claims might sound like a time machine is within reach, I clarify that this is a theoretical study and not an actual method for backward time travel. It's crucial for science communication to distinguish between theoretical possibilities in quantum physics and practical applications.
