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Where Do Space, Time and Gravity Come From?

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General relativity and quantum mechanics are the two most successful conceptual breakthroughs of modern physics, but Einstein’s description of gravity as a curvature in space-time doesn’t easily mesh with a universe made up of quantum wavefunctions. Recent work that tries to bring those theories together is revealing some mind-bending truths. In this episode, the physicist and author Sean Carroll talks with host Steven Strogatz about how space and time might be emergent properties of quantum reality, not fundamental parts of it.

Listen on Apple Podcasts, Spotify, Google Podcasts, Stitcher, TuneIn, or your favorite podcasting app, or you can stream it from Quanta.

Transcript

Steven Strogatz (00:03): I’m Steve Strogatz, and this is The Joy of Why, a podcast from Quanta Magazine that takes you into some of the biggest unanswered questions in science and math today. In this episode, we’re going to be discussing the mysteries of space and time, and gravity, too. What’s so mysterious about them?

Well, it turns out they get really weird when we look at them at their deepest levels, at a super subatomic scale, where the quantum nature of gravity starts to kick in and become crucial. Of course, none of us have any direct experience with space and time and gravity at this unbelievably small scale. Up here, at the scale of everyday life, space and time seem perfectly smooth and continuous. And gravity is very well described by Isaac Newton’s classic theory, a theory that’s been around for over 300 years now.

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https://d2r55xnwy6nx47.cloudfront.net/uploads/2022/05/TJY_Space_Time_2880x1620_Lede.jpgMichael Driver for Quanta Magazine

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Click the link below for the article:

https://www.quantamagazine.org/where-do-space-time-and-gravity-come-from-20220504?utm_source=pocket_discover

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2 Comments (+add yours?)

  1. mic
    Jun 19, 2022 @ 19:34:46

    👌👌👌✒⌛⏳⌚I still believe that time is just the result, thanks to which we were able to verify a lot of calculations. It is not a real quantity for the very existence or the very origin of the universe. Reactions only take place if the conditions are in place … no matter how much time passes.

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