mitchell porter's latest activity

I thought of posting this under Particle Physics, but it does go slightly beyond standard model, and in a way that could point to some...

Just to be clear, I claimed the problem was that chiral gravi-GUTs want to use SU(2)R as the gravitational gauge group, but in...

I think the summary in Sabine Hossenfelder's new video is excellent. Many important points made, I have bolded two at the end that...

Formally you could do it but that's not really a gravi-GUT any more, or at least the gravitational SU(2)R is no longer united with the...

If you're asking about vacuum selection, no one's even thinking about it. The focus in string phenomenology is still just to find vacua...

I do not see anything in their argument that actually relies on the topic being quantum gravity. They could have written a paper...

The standard model gauge group is SU(3) x SU(2)L x U(1)Y. Before the Higgs mechanism comes into play, the latter two subgroups give rise...

Gravi-GUT theories turn out to play a major role in the alternative physics of the past several decades. E8 theory by Garrett Lisi...

That's not the problem, the problem is that the existence of negative energy particles allows endless materialization without violation...

I report two paper which provide examples of ingredients one might expect in a field-theoretic treatment of the sbootstrap. "Color...

The problem with negative energy is not just "blasphemy", it is that you can have endless creation of something from nothing. You can go...

Noncomputability is a different thing from nondeterminism. It's actually related to undecidability, as is seen in the halting problem...

There is no consensus about how anything physical, classical or quantum, manages to relate to consciousness; and yet there needs to be...

I worked for Hameroff for a year. I consider their theory a great contribution, because of how mind-opening it is. In my opinion, if...

Yang-Mills is just ordinary quantum field theory; the strong and weak nuclear force are both Yang-Mills forces. But the reference to a...