Quantum 2.0: Hype or the Future?

Physicist Paul Davies's 'Quantum 2.0' provides an accessible journey through the realms of quantum physics, from its foundational principles to future technological applications. The book commendably breaks down complex subjects like quantum computing and cryptography without resorting to equations, making it readable for a general audience. Davies's enthusiasm is palpable, aiming to convey the wonder of the quantum universe.

However, the review raises concerns about Davies's tendency to overstate potential advancements. Examples include the unqualified claims about quantum computers aiding climate modeling and the uncritical presentation of manufacturer claims for quantum sensors. The book also uses outdated examples of quantum computer supremacy, potentially misleading readers less familiar with the field.

While acknowledging the profound impact of quantum physics on current and future technologies, the reviewer stresses the importance of balancing enthusiasm with scientific rigor and nuance. Overly speculative or unverified claims, especially when presented without caveats, risk setting up readers for disappointment regarding the true state of quantum research.