General · Language · Media

Image of entangled photons?

[Topic placeholder] [Developing story] Today’s news cycle contains articles about research by some physicists at the University of Glasgow who claim to have imaged entangled photons. Looks like they used a precision laser-based, table-top optical bench system. This Cnet article is a basic summary of the research: “Einstein called it ‘spooky action.’ Here’s an image… Continue reading Image of entangled photons?

General · Language · Media

Swaying quantum vacuum energy vs compelling charge

[“Models of the quantum vacuum” series] I read this article today “‘The Unknown Question’ — The End of Spacetime” (June 22, 2019) and watched the included YouTube videos. Something bothered me which I’ve been thinking about for years, namely, that even theoretical physicist Nima Arkani-Hamed sounded like he viewed the electron as like a spherical… Continue reading Swaying quantum vacuum energy vs compelling charge

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?

[Draft] [“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… Continue reading QFT – How many fields are there?

General · Language

Atomic tweezers — levitated optomechanics

[Topic placeholder] I’ve been following articles for awhile about micron, nanometer, and atomic level confinement and manipulation. The development of “optical tweezers” facilitated exploration of biological particles with sizes in the micrometer and nanometer range such as viruses and bacteria and subcellular components. Optical traps also facilitated exploring properties of trapped individual molecules and atoms.… Continue reading Atomic tweezers — levitated optomechanics

Language · Media

Ergosphere – what?

Regarding recent posts about black holes, here’s another YouTube video by The Science Asylum on the topic (published February 16, 2019): “Black Holes can SPIN?!?” I’ve previously highlighted The Science Asylum as a science communicator. This latest video is an interesting overview of black holes: non-spinning vs. spinning, the math vs. reality inside and outside… Continue reading Ergosphere – what?

General · Language · Media

Cosmological fact and fiction

In the last few months, I’ve been struck by how many articles have been published in the popular media and science news about black holes and the Big Bang. Mainstream physics and science communications (like phys.org, quantamagazine.org, etc) lately seem to be discussing more and more “mind blowing” geometries of the universe (or multiverse, eh).… Continue reading Cosmological fact and fiction