Something Deeply Hidden: Quantum Worlds and the Emergence of Spacetime

Written by:
Sean Carroll
Narrated by:
Sean Carroll

Unabridged Audiobook

Release Date
September 2019
10 hours 9 minutes

As you read these words, copies of you are being created.
Sean Carroll, theoretical physicist and one of this world’s most celebrated writers on science, rewrites the history of 20th century physics. Already hailed as a masterpiece, Something Deeply Hidden shows for the first time that facing up to the essential puzzle of quantum mechanics utterly transforms how we think about space and time.  His reconciling of quantum mechanics with Einstein’s theory of relativity changes, well, everything.

Most physicists haven’t even recognized the uncomfortable truth: physics has been in crisis since 1927. Quantum mechanics  has always had obvious gaps—which have come to be simply ignored. Science popularizers keep telling us how weird it is,  how impossible it is to understand. Academics discourage students from working on the 'dead end' of quantum foundations. Putting his professional reputation on the line with this audacious yet entirely reasonable book, Carroll says that the crisis can now come to an end. We just have to accept that there is more than one of us in the universe. There are many, many Sean Carrolls. Many of every one of us.
Copies of you are generated thousands of times per second. The Many Worlds Theory of quantum behavior says that every time there is a quantum event, a world splits off with everything in it the same, except in that other world the quantum event didn't happen. Step-by-step in Carroll's uniquely lucid way, he tackles the major objections to this otherworldly revelation until his case is inescapably established.
Rarely does a book so fully reorganize how we think about our place in the universe. We are on the threshold of a new understanding—of where we are in the cosmos, and what we are made of.
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Peter V.

Quantum Physics is foreign and doesn't make much sense to most people. Sean Carroll, as usual, does a great job explaining aspects of it and his preference for the Many Worlds Theory. It's not an easy read for those with no knowledge of Quantum physics but it is also not extremely difficult if one takes their time with it; Carroll tends to get his general point across in any case. A minor improvement for me would have been including some actual examples of measurement and as it relates to the Scrodinger equation would give a bit more of a concrete feel to how the equation is used in physics (for us non physicists). More importantly, the topic and where the author goes with the search for a Theory of Quantum gravity, is a very nice idea that could be incredibly important. The best 'interpretation' or theory of quantum mechanics potentially contirbuting to a theory of quantum-gravity is likely the next major breakthrough in the understanding of how our reality is what it is and what is really behind the reality we each perceive. So it is fantastic to hear such a knowledgable and eeply thinking expert give us a feel for both of these related goals. I would have liked to hear a bit more about quantum computing and whether the author feels that gives credence to the many worlds theory or not. The theoretical physicist and significant contributor to the Many Worlds Theory, David Deutch, posed the relevant question suppoting the Many Worlds Theory: how can quantum computers physically do the amount of calculation they do within the time they do, (i.e., if not for the input from other worlds - or at least reality from outside of our universe)? A mere 300 or so qubit quantum computer, when developed at some stage in the future, would have greater calculation power than a normal non-quantum computer using all the matter in our own single universe to make its calculations. To me Deutche's question seems like the smoking gun that gives the Many World theory enough to have it be the leading theory of quantum mechanics - but I may have missed something here?. Although my view of the reality of the Many World theory appears to be very slighly different to the authors (because i follow Deutch's slant on it a bit more), I found this book to be very well-paced, very well articulated and incredibly thought-provoking.

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Janes A.

I liked it. It convinced me (although no on it's own) that not only should the "ridiculous, unscientific, SciFi" many works theory be taken seriously, but that it's the best we got at the present time. Sean's voice is listenable and not too posh sounding like some science narrators. He reads a little fast though, but maybe I'm just a bit dumb. Excluding the first two chapters it would be very difficult for people new to quantum physics to follow, I'm not new to it and I found it hard to keep up. Then again, I may be a little dumb lol.

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