There have been a number of books about quantum physics, but they concentrated entirely on the science. I wanted to come at this from a different direction, because quantum theory has made such a difference to our lives. I'd argue that just as we've had the likes of the Stone Age and the steam age, where a particular technology has transformed the world, so now we live in the quantum age. In a sense, pretty well everything we do is based on quantum physics, given that all matter and light is made up of quantum particles - but what I mean here is technology that makes explicit use of quantum physics and couldn't have been designed without an understanding of it. Anything, for instance, using electronics or lasers or superconductors. A smartphone alone has at least seven different quantum technologies in it.
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