“Nobel Prize–winning physicist Aspect offers a brisk . . . overview of how Albert Einstein set off two twentieth-century upheavals in physics. In 1909, Einstein resolved scientific debate over the nature of light by proposing it ‘was both a particle and a wave,’ Aspect explains, noting that the discovery underpinned the development of computers and ‘lasers that enable the processing and transmission of information’ through optical fibers. The second revolution followed Einstein’s 1935 postulation that, according to quantum mechanics, there are circumstances under which two subatomic particles can be ‘entangled’ and act on each other regardless of the distance separating them. Aspect recounts how this idea remained the purview of abstract philosophical inquiry until the 1970s, when he and other physicists began developing techniques to work with entangled photons and paved the way for research that promises to produce quantum computers capable of performing calculations in a fraction of the time current computers require. Aspect does a solid job of covering how Einstein’s innovations have changed the world. . . . This intrigues.”

Publishers Weekly

“Aspect’s work was fundamental to showing that quantum theory really did do away with local reality—that entangled quantum particles were genuinely able to effectively communicate (even though we can’t control what they communicate) instantaneously at any distance. . . . For entanglement groupies like me, anything about the subject is worth having, and I’m glad to be able to read (translated from the French by Fagan) some words from the great man.”

Brian Glegg | popularscience.co.uk

“Fascinating. . . . Aspect’s beautiful experiment, completed in 1982, had a catalyzing effect on the scientific community. . . . The tiny spark of the second quantum revolution began to grow.”

David Kaiser, author of “Quantum Legacies,” from the foreword

“Lively, accessible, and brisk, Aspect’s book tells a compelling century-long story of groundbreaking discoveries. This is the perfect introduction to turn any reader into a quantum physics enthusiast.”

Florian Carle, manager of the Yale Quantum Institute

“This book tells a magnificent story of science, in which experimentation made it possible to resolve philosophical debates.”

Pour la Science (France), on the French-language edition

“Simple and excellent.”

L’affranchi de Chaumont (France), on the French-language edition

“A slim book that authoritatively outlines the foundations and paradoxical consequences [of quantum mechanics].”

Piero Bianucci | La Stampa (Italy), on the Italian-language edition

“Retraces one of the liveliest scientific debates of the last century.”

Almanacco della Scienza (Italy), on the Italian-language edition

“This book is a journey between theory and experiment, between mathematical models and reality, between science and technology.”

Massimo Inguscio, president emeritus of the Consiglio Nazionale delle Ricerche, Italy, from the foreword to the Italian-language edition