HeyJaredPost Quantum
General physics posts, news about the postquantum theory of classical gravity, the use of AI in physics, and updates about our group's research. While Rome burns...
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Postquantum gravity: a status update (part II) (opens the original)
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In part I of this status update, I covered a few recently published advances in the postquantum theory of classical gravity (PQG), including a path integral formulation of the theory, which is manifestly covariant. General covariance is important because gravity is our theory of spacetime geometry, and so it should obey the symmetry of spacetime, and be invariant under coordinate transformations. I then promised a part II, which I’d written but hadn’t yet posted. Since New Scientist just release
How to train your slop cannon (opens the original)
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Available on github: https://github.com/Open-Science-Ledger/how-to-train-your-slop-cannon)The guide is aimed at researchers who are mostly using LLMs through the chat window, but are willing to try coding agents. Although if the terminal fills you with dread, the newer desktop products such as Claude Cowork or OpenAI’s equivalent may suit you better and are rapidly catching up.<a class="button primary" href="https://superposer.substack.com/p/how-to-train-your-slop-cannon?utm_source=substack&utm_
Postquantum gravity: new results and the state of play (I) (opens the original)
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[this post is aimed at those with a physics background]The path-integral formulation of the Postquantum theory of classical gravity (PQG) has just been published in Physical Review X, with Zach Weller-Davies. Postquantum gravity is an alternative to quantum gravity approaches such as string theory, or asymptotic safety. Rather than quantising gravity, we ask whether spacetime can remain classical while coupling consistently to quantum matter. Surprisingly, it can.<a class="image-link image2" hre
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