Einstein introduced quantum entanglement in 1935 and referred to it as “spooky actions at a distance” because it seemed to conflict with his theory of special relativity. Today, some refer to it as "the greatest mystery in physics" and the 2022 Nobel Prize in Physics was even awarded for experimental confirmation of the "spookiness." While the mystery is experimentally well-established, its solution remains elusive because it is commonly believed that quantum entanglement entails that quantum mechanics is incomplete, that the world works according to "spooky actions at a distance," that causes from the future create effects in the present, that there is "superdeterministic" causal control of experimental procedures, that people can correctly disagree on the outcome of one and the same experiment, and that a single experimental measurement can produce all possible outcomes. In this book, a rigorous solution to the mystery of quantum entanglement is provided that entails none of those things. The key to this seemingly impossible feat is - to use Einstein's own language - a "principle" explanation that foregoes the need for any "constructive" explanation of quantum entanglement, such as those listed above. Ironically, the proposed principle explanation is Einstein's own relativity principle as grounded in quantum information theory. So contrary to popular belief, quantum mechanics and special relativity are far from inconsistent, as both are a consequence of the exact same relativity principle.

"Presents a compelling and interesting novel approach to making sense of quantum mechanics." - Emily Adlam, Chapman University, Orange, California

"Mark Stuckey and his co-authors perform a rigorous reconstruction of quantum theory, drawing inspiration from the elegant axiomatic foundations of special relativity in Einstein's Entanglement. At the centre of the authors transformative principle is an information-theoretic interpretation of the quantum state that unravels many counterintuitive aspects of quantum theory in an appealing and natural way." - Časlav Brukner, Science Director of the Institute for Quantum Optics and Quantum Information (IQOQI), Vienna

"Einstein's Entanglement is an engaging introduction to all-at-once physics, offering a simple and compelling new axiomatization of quantum mechanics, which demonstrates the power of the all-at-once approach while also revealing intriguing connections with special relativity." - Emily Adlam, Schmid College of Science and Technology, Philosophy and Physics, Chapman University

"Stuckey et al. have been doing "all-at-once" physics since before it was cool. Their use of a simple principle, treating past and future in the same manner, looks like a great starting point for making sense of quantum entanglement." - Ken Wharton, Professor of Physics & Astronomy, San Jose State University

"Written at a relatively elementary level, this insightful and engaging treatment of quantum entanglement shows how an information-theoretic approach inspired by Einsteinâs methodology in the special theory of relativity can demystify what Schrödinger called the characteristic trait of quantum mechanics, making the departure from classical thinking more natural and comprehensible." - Jeffrey Bub, Distinguished University Professor in the Department of Philosophy and the Joint Center for Quantum Information and Computer Science, University of Maryland