THE MIND-BENDING WORLD OF QUANTUM THEORY. Quantum theory is our very best description of the microscopic world of atoms and their constituents. It has given us lasers, computers and nuclear reactors, and even tells us how the sun shines and why the ground beneath our feet is solid. Yet the quantum world defies our sensibilities - it is a place where objects can be in two places at once, influence each other at opposite sides of the cosmos and nothing is as it seems until you measure it. Why is the quantum world so strange? Where does it begin and end? And what does this mean for the bedrock of reality? In attempting to address such frontier questions, physicists have come to realize that the quantum world promises exciting new technologies: the ability to communicate with absolute security, computers more powerful than anything built before and even quantum teleportation. In THE QUANTUM WORLD leading physicists and New Scientist take us on journey through quantum theory, its mind-bending properties and the technologies transforming our world. There is a sting in the tale: is quantum theory truly the ultimate theory of reality? ABOUT THE SERIES New Scientist Instant Expert books are definitive and accessible entry points to the most important subjects in science; subjects that challenge, attract debate, invite controversy and engage the most enquiring minds. Designed for curious readers who want to know how things work and why, the Instant Expert series explores the topics that really matter and their impact on individuals, society, and the planet, translating the scientific complexities around us into language that's open to everyone, and putting new ideas and discoveries into perspective and context.