Introduction to JavaScript Object Notation

Quantum gravity is among the most fascinating problems in physics. It modifies our understanding of time, space and matter. The recent development of the loop approach has allowed us to explore domains ranging from black hole thermodynamics to the early Universe. This book provides readers with a simple introduction to loop quantum gravity, centred on its covariant approach. It focuses on the physical and conceptual aspects of the problem and includes the background material needed to enter this lively domain of research, making it ideal for researchers and graduate students. Topics covered include quanta of space; classical and quantum physics without time; tetrad formalism; Holst action; lattice QCD; Regge calculus; ADM and Ashtekar variables; Ponzano-Regge and Turaev-Viro amplitudes; kinematics and dynamics of 4D Lorentzian quantum gravity; spectrum of area and volume; coherent states; classical limit; matter couplings; graviton propagator; spinfoam cosmology and black hole thermody

In this short book, renowned theoretical physicist and author Carlo Rovelli gives a straightforward introduction to Einstein's General Relativity, our current theory of gravitation. Focusing on conceptual clarity, he derives all the basic results in the simplest way, taking care to explain the physical, philosophical and mathematical ideas at the heart of “the most beautiful of all scientific theories”. Some of the main applications of General Relativity are also explored, for example, black holes, gravitational waves and cosmology, and the book concludes with a brief introduction to quantum gravity. Written by an author well known for the clarity of his presentation of scientific ideas, this concise book will appeal to university students looking to improve their understanding of the principal concepts, as well as science-literate readers who are curious about the real theory of General Relativity, at a level beyond a popular science treatment.

A delightful intellectual feast from the bestselling author of Seven Brief Lessons on Physics and The Order of TimeOne of the world’s most prominent physicists and a fearless free spirit, Carlo Rovelli is also a masterful storyteller. His bestselling books have introduced millions of readers to the wonders of modern physics and his singular perspective on the cosmos. This new collection of essays reveals a curious intellect always on the move. Rovelli invites us on an accessible and enlightening voyage through science, literature, philosophy and politics.Written with his usual clarity and wit, this journey ranges widely across time and space: from Newton’s alchemy to Einstein’s mistakes, from Nabokov’s epidopterology to Dante’s cosmology, from mind-altering psychedelic substances to the meaning of atheism, from the future of physics to the power of uncertainty. Charming, pithy and elegant, this book is the perfect gateway to the universe of one of the most influential minds of our age.

From the bestselling author of Seven Brief Lessons on Physics, a concise, elegant exploration of time.Why do we remember the past and not the future? What does it mean for time to "flow"? Do we exist

Everything you need to know about the beauty of modern physics in less than 100 pages.In seven brief lessons, Italian theoretical physicist Carlo Rovelli guides readers with admirable clarity through

What are time and space made of? Where does matter come from? And what exactly is reality? From Aristotle to Albert Einstein, Michael Faraday to the Higgs boson, the author takes us on a journey to sh

The bestselling author of Seven Brief Lessons on Physics takes us on an enchanting, consoling journey to discover the meaning of time'We are time. We are this space, this clearing opened by the traces

Everything you need to know about modern physics, the universe and our place in the world in seven enlightening lessons 'Here, on the edge of what we know, in contact with the ocean of the unknown, sh