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The biggest open problem in the foundations of physics is that Einstein’s theory of gravity, General Relativity, does not cooperate with quantum mechanics. Physicists have tried to solve this issue by coming up with a theory of quantum gravity, but those theories fall apart when you need them most – inside of black holes and at the Big Bang. Recently, though, physicists published a new calculation for the Big Bang, with a theory called quadratic gravity, which lets us skip over quantum gravity entirely, and that could explain the origin of time. Let’s take a look.
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/ @sabinehossenfelder 📚 Buy my book ➜ https://amzn.to/3HSAWJW #science #sciencenews #physics #gravity This video discusses a new explanation for the beginning of the universe, published in PRL, which addresses quantum gravity and the period before time began. It features a presenter discussing “Asymptotically Safe Gravity” and includes scientific graphics and charts related to cosmological research. This new idea elegantly addresses the origin of the universe and offers a fresh perspective on space time, making it a significant contribution to science news.
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💌 Support me on Donorbox ➜ https://donorbox.org/swtg.
👉 Transcript with links to references on Patreon ➜ / sabine.
📝 Transcripts and written news on Substack ➜ https://sciencewtg.substack.com/
📩 Free weekly science newsletter ➜ https://sabinehossenfelder.com/newsle…
👂 Audio only podcast ➜ https://open.spotify.com/show/0MkNfXl…
🔗 Join this channel to get access to perks ➜
/ @sabinehossenfelder.
📚 Buy my book ➜ https://amzn.to/3HSAWJW
#science #sciencenews #physics #gravity.
This video discusses a new explanation for the beginning of the universe, published in PRL, which addresses quantum gravity and the period before time began. It features a presenter discussing \.
Science/Philosophy did not introduce a defintion for ´time´ up to now. And therefore every discussion about is is of poor quality — as long as we do not know what ´time´ is, every statement about it is doubtful. To solve this problem I wil suggest a definition for ´time´:
When we wind up the spring of a clock-work or when we insert a battery — then we will add energy to it. And ´time´ will pass by in the clock as long as we have a flow of energy — according with the laws of thermodynamics; because a clock-work is a machine.
Time pass by when we have a flow of energy — then we can suggest the definiton for ´time´: TIME IS ENERGY
Our universe had its highest concentration of energy at the big-bang. With the expansion of the universe the average-concentration-of-energy-per-volume will decrease. This is a mechanism which we know of machines — who work according to the laws of thermodynamics.
Therefore we can say: that our universe is a machine too.
With the definition TIME IS ENERGY we have a new access to discuss questions about the origin / quality of ´time´ — which was not discussed up to now.
e.g. the idea ´space time´ is doubful when ´time is energy´ — and all ideas which belong to the idea of the ´space time´.