Recent content by mitchell porter

It's not a state that leads to self-annihilation because it's not about having an atom and an anti-atom in the same branch of the wavefunction, it's about having a quantum state which has some probability to be an atom and some probability to be an anti-atom. It seems very weird to me, but if it...

This is an alert about a claim regarding the standard model, that got a burst of attention in the past two weeks. The original paper came out last year: "The electroweak η_W meson" by Gia Dvali, Archil Kobakhidze, Otari Sakhelashvili (2024) The recent follow-up and other responses are...

May I emphasize that the authors are talking about Euclidean 4-space. The point being that QFT calculations are often carried out in a context of 4 space and 0 time dimensions, because the mathematics is more tractable, and then the answer is transformed "as if" it had been carried out in a...

An almost-phenomenological paper has appeared which cites some of this work: "Fixed points of classical gravity coupled with a Standard-Model-like theory" by Latham Boyle, Neil Turok, Vatsalya Vaibhav Apparently the motivation is to look for special QFTs which, when coupled to quantum...

A previous paper by this author was discussed in this thread in posts #251-252, and the author himself appeared at #262. I commented on his research program here. Of all the ingredients in his calculation of fermion masses, the idea that I find the most credible, is that there might be some...

I can first name the two papers that I mentioned: "Path integral for the Hilbert-Palatini and Ashtekar gravity" (Alexandrov and Vassilevich 1998) "Generalized Symmetry in Dynamical Gravity" (Clifford Cheung et al 2024) Also see the last paragraph of this comment from last year. The 1998...

Fermion doubling is just one form of a broader phenomenon, in which de facto extra fermions are brought about by the existence of extra zero-energy modes or "zero modes" of a fermionic field. A version of this actually occurs in string theory - the number of generations produced by a Calabi-Yau...

This is a response to an article from five years ago (Chae et al 2020) claiming to detect an effect of MOND (the "external field effect") in a particular population of galaxies. The authors of the present paper say, if true this would be the first violation of general relativity detected, so...

I have no time to think about this, but I will just mention that coincidentally, a very similar issue came up in a physics discussion the other day. It was about Eric Weinstein's theory of everything, and the other person insisted that "any gravitational theory requires infinite higher spin...

I have not had time or mental space in which to think about it, but I've just noticed that a recent Clifford-algebra GUT paper from Portugal "Spacetime Grand Unified Theory" by Gonçalo M. Quinta mentions the Brannen parametrization of Koide! This is still sufficiently rare that we should try...

A dielectric is a substance made of electric dipoles which, when placed in an external electric field, reduces the electric field because its constituent dipoles line up and contribute their own opposing field. For some years, the astrophysicist Luc Blanchet has proposed to explain MOND via a...

I can't access any of those, but Dirac's paper is the subject of https://arxiv.org/abs/1902.10367, and SO(3,3)'s Lie algebra is discussed in https://doi.org/10.3390/sym12050817, and its double cover Spin(3,3) in https://doi.org/10.3390/particles6010008. I'm interested in ideas like these, but...

I've only scraped the surface of the paper, and still don't see a way to bring it into contact with supergravity. But there's a picture on page 12 (figure 5) that is useful for general understanding. At some level, Furey is talking about an algebra of 16x16 matrices. As this diagram shows...

Nichol Furey (best known for trying to get the standard model from the octonions) has now contributed to the genre of "getting the standard model, except for the top quark, from a nonstandard supersymmetric structure": "A Superalgebra Within: representations of lightest standard model particles...

If this were true, string theorists would talk about it all the time. Applications from string theory in material science and design? It is common to claim that the AdS/CFT duality from string theory, has applications in material science, so that part is somewhat justified. There are articles...