If an asymmetry in time does not arise from the fundamental dynamical laws of physics, it may be found in special boundary conditions. The argument normally goes that since thermodynamic entropy in the past is lower than in the future according to the Second Law of Thermodynamics, then tracing this back to the time around the Big Bang means the universe must have started off in a state of very low thermodynamic entropy: the Thermodynamic Past Hypothesis. In this paper, we (...) consider another boundary condition that plays a similar role, but for the decoherent arrow of time, i.e. the quantum state of the universe is more mixed in the future than in the past. According to what we call the Entanglement Past Hypothesis, the initial quantum state of the universe had very low entanglement entropy. We clarify the content of the Entanglement Past Hypothesis, compare it with the Thermodynamic Past Hypothesis, and identify some challenges and open questions for future research. (shrink)

Quantum physicist, New York Times bestselling author, and BBC host Jim Al-Khalili reveals how 8 lessons from the heart of science can help you get the most out of life Today’s world is unpredictable and full of contradictions, and navigating its complexities while trying to make the best decisions is far from easy. The Joy of Science presents 8 short lessons on how to unlock the clarity, empowerment, and joy of thinking and living a little more scientifically. In this brief (...) guide to leading a more rational life, acclaimed physicist Jim Al-Khalili invites readers to engage with the world as scientists have been trained to do. The scientific method has served humankind well in its quest to see things as they really are, and underpinning the scientific method are core principles that can help us all navigate modern life more confidently. Discussing the nature of truth and uncertainty, the role of doubt, the pros and cons of simplification, the value of guarding against bias, the importance of evidence-based thinking, and more, Al-Khalili shows how the powerful ideas at the heart of the scientific method are deeply relevant to the complicated times we live in and the difficult choices we make. Read this book and discover the joy of science. It will empower you to think more objectively, see through the fog of your own preexisting beliefs, and lead a more fulfilling life. (shrink)

In The Joy of Science, Jim Al-Khalili presents eight lessons that serve as a guide to thinking and living life a little more scientifically. It is a gentle entrée to the conceptual core of what science is and the spirit of how it is practiced, which will help any reader understand how to live a more rational life and benefit from doing so. The book will connect the lay public with what science fundamentally is - not knowledge per se, but (...) rather a way of thinking, which gives us the power to turn encounters with the unknown into greater insights into the true nature of reality. In an engaging, conversational tone, and writing from the perspective of a practitioner of science, Al- Khalili invites readers to engage with the world in a new way and to think as scientists are trained to do about unsolved mysteries; the nature of truth, uncertainty, and the role of doubt; the value and dangers of simplification; the challenges of complexity or too little information; the importance of evidence-based thinking; the value of guarding against bias (in oneself and others); the importance of being able to change one's mind, and more. By the end, the reader will come away with a clear sense of how the ideas at the heart of the scientific method are deeply relevant to our current times, lives, and personal decision making. Knowing how to think and live more scientifically can make our all of our lives better, and this short book gives non-specialists a welcoming introduction to this knowledge, sharing "the joy" that science can bring. (shrink)

Get the science facts, not science fiction, on the cutting-edge developments that are already changing the course of our future. Every day, scientists conduct pioneering experiments with the potential to transform how we live. Yet it isn’t every day you hear from the scientists themselves! Now, award–winning author Jim Al–Khalili and his team of top-notch experts explain how today’s earthshaking discoveries will shape our world tomorrow—and beyond. Pull back the curtain on: genomics robotics AI the “Internet of Things” synthetic biology (...) transhumanism interstellar travel colonization of the solar system teleportation and much more And find insight into big–picture questions such as: Will we find a cure to all diseases? The answer to climate change? And will bionics one day turn us into superheroes? The scientists in these pages are interested only in the truth—reality-based and speculation-free. The future they conjure is by turns tantalizing and sobering: There’s plenty to look forward to, but also plenty to dread. And undoubtedly the best way to for us to face tomorrow’s greatest challenges is to learn what the future looks like—today. Praise for What the Future Looks Like “A collection of mind-boggling essays that are just the thing for firing up your brain cells.” —Saga Magazine “The predictions and impacts are global... [and] the book contains far more fascinating information than can be covered in this review.” —Choice “This book is filled with essays from experts offering their informed opinions on what the science and technology of today will look like in the future, from smart materials to artificial intelligence to genetic editing.” —Popular Science “Fun is an understatement. This is a great collection to get the summer book season started.” —Forbes.com “The focus on sincere, factual presentation of current and future possibilities by leading experts is particularly welcome in this era of fake news and anti-science rhetoric.” —Library Journal. (shrink)