Deep down things revisited: information and physics

This post gives an update on the development of the idea of information as a constituent of the physical world, and is a companion piece to earlier posts on information in the biological domain, on the conservation of information, on quantum information, and on the theory of relativity and its informational component. All are expressions… Continue reading Deep down things revisited: information and physics

Physicist as librarian; Henri Poincaré’s intriguing metaphor

Among the new additions to Oxford University Press's admirable series of Very Short Introductions is a revised edition of J.L. Heilbron's VSI to the History of Physics. An interesting read in general, it raises one intriguing idea in particular; the metaphor of physicist as librarian. Libraries and documents feature throughout the book. Heilbron notes that… Continue reading Physicist as librarian; Henri Poincaré’s intriguing metaphor

Can information be conserved, and why would it matter?

The idea that information may be conserved may strike many of us interested in recorded human information information as faintly ridiculous. By 'conserved', we mean that there is a fixed amount of information in the universe, and that, while it may be changed, it can neither be created nor destroyed. This does not seem to… Continue reading Can information be conserved, and why would it matter?