Skip to main content

The God Effect – Brian Clegg *****

We are used to hearing about “Einstein’s greatest mistake” being his throwing in the cosmological constant to explain the expansion of the universe. These days this seems less of a mistake than it was first thought. But there’s one thing he definitely didn’t get right – that’s quantum entanglement, a concept so bizarre, that Einstein used it as an example of why quantum theory had to be wrong.
In fact it was Einstein who for once was mistaken, and entanglement has proved, as Brian Clegg’s subtitle suggests, to be one of science’s strangest phenomena. Imagine a link between two particles that is so low level that you can separate them to either side of the universe and a change in one particle will be instantly reflected in the other. Forget special relativity – the spooky connection of entanglement doesn’t know about the light speed barrier.
The God Effect (the title is a reference to the Higgs boson, also known as the God Particle, which it has been suggested requires entanglement to function) begins with an excellent background to where entanglement came from – Einstein’s original “entanglement busting” paper EPR, early attempts to show whether or not entanglement existed and the definitive experiments that demonstrated it in action. Although we’re dealing here with quantum physics at its most mindboggling, Clegg makes a great job of explaining what was going on in layman’s terms, and bringing alive the major characters not widely known outside this field, such as John Bell and Alain Aspect.
Where the book really triumphs, though, is when he moves onto the remarkable applications of entanglement that have started to be developed over the last few years. Unbreakable encryption, computers that can crack problems that would take conventional computers longer than the lifetime of the universe to cope with, even Star Trek-style matter transmitters. It’s great stuff. I particularly liked the chapter on why entanglement doesn’t allow us to send faster than light messages. Most of the books I’ve read on the subject just dismiss this as obvious, but it isn’t – in fact it’s what most people think of as soon as they hear about entanglement: surely it could be used to send faster than light messages. Clegg explains just what the implications would be – why faster than light messages would allow us to send information back in time – then shows how entanglement entices, but can never actually deliver on this promise.
There’s also some fun speculation from top scientists on what else entanglement could do – not just providing a mechanism for the Higgs boson, but also the existence of life, telepathy and more. The only criticism I have is that the chapter on quantum computers told me rather more than I wanted to know about different ways to make quantum computers work – it was still interesting, but I didn’t need that much detail.
Overall this is a superb exploration of this weird and wonderful physical phenomenon and the ways it could change our lives. It’s well written and approachable without any technical background, though I think it may also appeal to undergraduates, as entanglement tends to get very limited coverage on physics courses. Recommended.
Paperback:  
Review by Martin O'Brien

Comments

Popular posts from this blog

Einstein's Greatest Mistake - David Bodanis ****

Books on Einstein and his work are not exactly thin on the ground. There's even been more than one book before with a title centring on Einstein's mistake or mistakes. So to make a new title worthwhile it has do something different - and David Bodanis certainly achieves this with Einstein's Greatest Mistake. If I'm honest, the book isn't the greatest on the science or the history - but what it does superbly is tell a story. The question we have to answer is why that justifies considering this to be a good book.
I would compare Einstein's Greatest Mistake with the movie Lincoln -  it is, in effect, a biopic in book form with all the glory and flaws that can bring. Compared with a good biography, a biopic will distort the truth and emphasise parts of the story that aren't significant because they make for a good screen scene. But I would much rather someone watched the movie than never found out anything about Lincoln - and similarly I'd much rather someon…

Four Way Interview - Tom Cabot

Tom Cabot is a London-based book editor and designer with a background in experimental psychology, natural science and graphic design. He founded the London-based packaging company, Ketchup, and has produced and illustrated many books for the British Film Institute, Penguin and the Royal Institute of British Architects. Tom has held a lifelong passion to explain science graphically and inclusively ... ever since being blown away by Ray and Charles Eames’ Powers of Ten at an early age. His first book is Eureka, an infographic guide to science.

Why infographics?
For me infographics provided a way to present heavy-lifting science in an alluring and playful, but ultimately illuminating, way. And I love visualising data and making it as attractive as the ideas are.  The novelty of the presentation hopefully gets the reader to look afresh. I love the idea of luring in readers who might normally be put off by drier, more monotone science – people who left science behind at 16. I wanted the boo…

A Tale of Seven Scientists - Eric Scerri ***

Scientists sometimes tell us we're in a post-philosophy world. For example, Stephen Hawking and Leonard Mlodinow in The Grand Design bluntly say that that philosophy is 'dead' - no longer required, as science can do its job far better. However, other scientists recognise the benefits of philosophy, particularly when it is applied to their own discipline. One such is Eric Scerri, probably the world's greatest expert on the periodic table, who in this challenging book sets out to modify the philosophical models of scientific progress.

I ought to say straight away that A Tale of Seven Scientists sits somewhere on the cusp between popular science and a heavy duty academic title. For reasons that will become clear, I could only give it three stars if rating it as popular science, but it deserves more if we don't worry too much about it being widely accessible.

One minor problem with accessibility is that I've never read a book that took so long to get started. First t…