General · Language

Defining a universe — how many constants?

[Draft] [“Building a ‘verse” series] Reference: “How Many Fundamental Constants Does It Take To Explain the Universe?” by Ethan Siegel (Nov 23, 2018). Quite a large number of fundamental constants are required to describe reality as we know it … The fundamental constants … describe the strengths of all the interactions and the physical properties… Continue reading Defining a universe — how many constants?

General · Language · Media

The proton and perturbation problem

[Draft] [“Building a ‘verse” series] I’ve cited this physicist’s video elsewhere, but Perimeter Institute’s overview of her lecture includes a helpful characterization of perturbation theory in the context of understanding the proton better: “Phiala Shanahan builds the universe – with a new approach to calculations and the aid of supercomputers, Emmy Noether Visiting Fellow Phiala… Continue reading The proton and perturbation problem

General · Language

QFT – How many fields are there?

[“Building a ‘verse” series] Ever since I started reading about Quantum Field Theory (QFT), I was interested in how physicists talk about fields. And the multiplicity of fields. And how quantum fields compare to classical fields. So, as I’ve written elsewhere, the basic notion is that every matter particle is an excitation (or localized vibration)… Continue reading QFT – How many fields are there?