Luckily you can check out the author’s bio right from the article:

Dr. Don Lincoln is a Senior Scientist at Fermilab, America’s leading particle physics laboratory, who has coauthored over 1,500 scientific papers. He was a member of the teams that discovered the top quark in 1995 and the Higgs boson in 2012.

Actually, cats really are alive and dead at the same time according to the many worlds interpretation. Under classical quantum mechanics, we say that superpositions collapse when observed, and since the cat is an observer of the quantum event (since the cat would die if the atom decayed), then the cat's presence resolves the superposition. Thus, the cat is never in superposition.

However, according to the many worlds interpretation, observation does not collapse superposition. Rather, it simply expands the superposition to include the observer. So the cat, as an observer of the quantum event, really is both alive and dead. And at the moment that you open the box to see whether the cat died, you will also observe the quantum event and become part of the superposition as well. You will both see a dead cat, and see a living cat. But your consciousness only experiences one of these possibilities. Presumably, you have another consciousness in the other possibility observing the cat in the other state. Two separate timelines have been created, which will each progress on their own according to causality. We may also call these timelines worlds or universes, seeing as they're mostly self contained.

Just relax and enjoy your vanilla latte with quantum foam.

The concepts are basically right arent they?

Conceptually, the nihilists are right! Nothing does matter.

Nope, they actually appear and disappear. The idea is that even in vacuum there's a certain amount of background energy and that energy can randomly turn into matter-antimatter pairs in what is basically the inverse of matter-antimatter annihilation.

To a certain degree, as they mentioned in the article regarding the casimir effect. While one cannot keep out the quantum foam entirely, it can be restricted to specific wavelengths by altering the volume of the space.

It's that they're using a more normal people term. They probably wanted to say vacuum.

So I wonder, even if it’s only appearing very briefly it’s still going to exert some small gravitational effect.

I don't think so. Remember: This is energy being converted to mass, not mass coming out of nowhere.

Would be nice if we could measure quantum-foam activity depending on gravity well intensity. Let's say somewhere around Venus and Pluto to compare (sun's well).