[Draft] If space-time is considered as a kind of material, then what properties make sense? Properties that can be observed, measured. In the context of General relativity, (aggregate) properties related to curvature and rippling. Like elasticity, stiffness. In the context of quantum physics, (discrete) properties related to quanta, energy density, charge, spin, entanglement. Like gradients,… Continue reading How stiff is space-time?
[Communicating science] To understand contemporary physics, particularly quantum theory, the Standard Model is essential. This article includes an excellent video overview: • Quanta Magazine > Math Meets QFT > “A Video Tour of the Standard Model” by Kevin Hartnett, Senior Writer/Editor (July 16, 2021) (quote) Physicists would like to move beyond the Standard Model to… Continue reading Reality of fields, language of particles – the Standard Model
[“What’s changed in the last ~50 years” series] Fundamental particles have properties; but not due to any constituents (cf. Feynman’s dilemma for an electron’s charge ). So, mathematical patterns of … localized “knots” (tangles or twists as in Möbius strips) – particular symmetries – of space-time energy? A landscape of colliding (interacting) ripples … How… Continue reading A particle by any other name?
Taking all-sky surveys / maps to another 10^n level of visualization … So much of modern cosmology depends on the discovery of the cosmic microwave background (CMB) radiation in 1965. Wiki: “Any proposed model of the universe must explain this radiation.” Since then, advances in the tools to measure and analyze that faint, relic radiation… Continue reading Big sim’s – visualizing the universe!
Advances in all-sky surveys permit better visualization of the motions and dynamics inside our galaxy. And provide a better understanding of the evolution of the Milky Way. X-ray all-sky surveys As noted in this Space.com article, while “optical telescopes are much easier to design than X-ray telescopes … some of the most interesting objects in… Continue reading All-sky surveys – visualizing our dynamic galaxy
Quote: “Always two there are, no more, no less.” – Star Wars: Episode I – The Phantom Menace  Well, stars do not always come in pairs (or triples, etc.). But binary stars – stellar pairs – are common. Estimates vary. Wiki uses an estimate “that approximately one third [33%] of the star systems in… Continue reading Stellar pairs – when the tango stops
[“Quantum foundations” series] Carlo Rovelli’s new book Helgoland – Making Sense of the Quantum Revolution is in the news cycle this week, with promo’s and reviews. (Probably more comments later.) (quote) Helgoland is a book by Italian physicist Carlo Rovelli. It is about quantum mechanics and its relational interpretation. The title refers to Werner Heisenberg’s… Continue reading Helgoland? – escape from quantum island
When not merely obscured in our field of view, things which we cannot see – that are essentially invisible – often may be either impossibly distant or impossibly small (among other factors). That’s why we have telescopes and microscopes. At cosmic scales, imaging a black hole was like seeing something spanning “the size of a period… Continue reading Imaging atoms – seeing the impossibly small
As noted in comments for my “The future of (particle) physics?” post, the first results from Fermilab’s Muon g-2 experiment are a big deal for physics. Waiting for years. Highly anticipated. As expected, today these results were officially released. Fermilab itself released an excellent YouTube video visualization which includes background on the project and experiment… Continue reading Evidence for new physics? > Fermilab’s Muon g-2 results announced
[“What’s changed in the last 50 years” series] Another interesting Symmetry Magazine article – a historical recap of the Standard Model and some highlights. • Symmetry Magazine > “Six fabulous facts about the Standard Model” by Sarah Charley ( March 16, 2021) – Learn about the Standard Model of particle physics and how physicists use… Continue reading Particle zoo to Standard Model and beyond