This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
I PROD'ed the above. The article contains an equation that, as currently written, is fundamentally wrong on multiple levels; a discussion with the original author on the talk page makes it clear that the original author is quite unaware of the mistakes, or how to fix them. As this is an arcane topic (how to correctly couple spinor fields to torsion in gravitation), it seems highly unlikely that anyone will show up and fix this (especially since the article is misnamed, these are not your father's polar coordinates) and so PROD'ing for deletion seems like the only reasonable choice. Besides, Wikipedia already has other articles that already explain how to correctly couple spinor fields to torsion, so having an article on a confusing equation that cannot be explained is ... just wrong. 67.198.37.16 ( talk) 19:58, 22 November 2020 (UTC)
Anyone curious about obsolete theories of gravity? A while back, I took a look at the Whitehead's theory of gravitation article and put some effort into the prose and the referencing. As I recall, I thought about adding more details about the formulae, but then had a moment of "there's no good notation for this!" and tossed my hands in the air, figuratively speaking. Prompted by John Baez on the Talk page, I took another stab at it, but I'm sure it can still be improved upon. XOR'easter ( talk) 16:39, 1 December 2020 (UTC)
I find the notation hard to understand, but that's pretty common in Wikipedia articles so I'd say this is a big step forwards. Someday maybe I'll take a crack at understanding Whitehead's theory better and then I'll reread this and try to polish it up. Maybe someone else will beat me to it! John Baez ( talk) 18:30, 6 December 2020 (UTC)
In the wake of the the Mass dimension one fermions AfD, I thought that it might be worthwhile to figure out what the heck this ELKO thing is. I think I've found an answer; its an 8-component spinor (see below). A key issue is that the majority of the literature on it is incredibly disappointing, and is not written in a fashion that I find clear and coherent (see, however, exception below). Here's what I've been able to deduce so far:
I was deeply unhappy with the poor quality of the literature, until I found the eqn above. I'm planning to start a draft stub at Draft:ELKO Theory real soon now, which perhaps might be promotable to article space. Again, an invite to anyone who might want to explore more deeply. 67.198.37.16 ( talk) 20:07, 23 November 2020 (UTC)
There is a discussion in talk:proton about quark/gluon diagrams for the proton (and I presume others). The discussion suggests consensus here for any changes, though I don't see any discussion here. The discussion in Talk:Proton/Archive_1#diagram_of_quarks_in_proton seems to be a few years old. One question might be, how accurate should the diagram be? This one seems to allow quark-gluon, three-way gluon interaction, and four-way gluon interaction. Should the diagram show those? My original thought was to include both wavy-lines between quarks, and the wye diagram currently there in one diagram. (That is the combination of the two.) I don't think we have room for the infinite number of allowed diagrams. The current one seems to suggest only the three-way interaction. Gah4 ( talk) 00:47, 6 November 2020 (UTC)
Sorry for the late reply, I just now saw User:Gah4 and User:A. di M. and User:LaundryPizza03 comments above. By "at the same time", what I mean is that the Lagrangian for quarks has the generic form where psi is the quark field, and the A is the gluon field. The way this is to be read (if it is converted into a scattering amplitude, or an s-matrix) is that a quark comes in (the psi-bar) and either propagates ("wiggles around in a differential equation like way") (the partial symbol) or it hits (emits/absorbs) one and exactly one gluon (the A) and then it leaves (the psi). That's it -- comes in, hits one gluon, leaves. The Lagrangian for gluons has the generic form which can be read as saying "gluons propagate" (the partial-A part - one gluon comes in one goes out) or three gluons interact or four gluons interact (the products involving the [A,A] term.) The electromagnetic field does not have the [A,A] term, and so photons can only propagate. This three-gluon interaction is what makes gluons so unique and distinct (and is the reason for all the hoopla about Yang-Mills).
So here's the deal with the Delta diagram: with a suitable relablelling, and a suitable "time scale", it would also be an accurate diagram for Helium - one nucleus, two electrons, and some photons bouncing between the nucleus and the electrons, keeping the whole thing in a stable, bound state. The Wye diagram could never-ever describe Helium, because three photons just cannot interact in that Wye kind of way. The Wye is very unique to QCD.
For the "at the same time", for a helium atom, you could draw a diagram with 3 particles (nucleus, the two electrons) and 42 different photons going every which-way, but the photons must be two-ended: must always begin and end on the nucleus/electron. For QCD, you could draw a diagram with 3 quarks and 42 gluons, but now the gluons can bump into each other, so they form a big random network of wiggly lines. So, when you add time, this is how these diagrams differ. Anyway, that is why I like the Wye. The Delta for quarks isn't "wrong", its just maybe (mildly?) misleading, while the Wye diagram kills two birds with one stone... 67.198.37.16 ( talk) 04:20, 23 November 2020 (UTC)
I prodded this as unreferenced. It has sat without cites since 2007 and the title does not seem to appear anywhere outside of Wikipedia. It might be good content or it might be original research. I don't have the expertise to tell. - SimonP ( talk) 21:03, 9 December 2020 (UTC)
An editor, Luca-Spinor-Torsion, whose real name is Luca Fabbri, has added citations to his own papers in Dirac equation and De Broglie–Bohm theory. I've undone the edits. Tercer ( talk) 13:44, 10 December 2020 (UTC)
Big Freeze is currently up for discussion at RfD. I thought you might be interested.
Also, looking at wikt:en:Big Freeze#English, the definition on Wiktionary needs a rewrite. Anyone want to give it a try?
-- 67.70.26.89 ( talk) 11:02, 12 December 2020 (UTC)
/info/en/?search=Sudbury_Neutrino_Observatory has a dead link that would be an easy fix for someone who knows what they are talking about. The database for the original link HEP Spires was migrated to HEP Inspire. I left a note on the talk page but that might not be found this century, so I thought I'd put it somewhere in the Physics department. Hope someone can do the fix. Sorry if this was the wrong place to ask. Thanks. — Preceding unsigned comment added by 2600:1700:1c60:45e0:a9a6:aa4d:32ae:1bc4 ( talk • contribs)
Taking a guess, I accepted this to keep it from being deleted at 6 months. It would seem related to Jefimenko's equations, but I'm not at all an expert. I cannot tell if a merge is appropriate, or whatever, I leave it to the physics people here. DGG ( talk ) 00:09, 15 December 2020 (UTC)
Additional voices might be helpful over here:
Cheers, XOR'easter ( talk) 18:11, 11 December 2020 (UTC)
For the past week, an paper has been circulating about a theory that fragments of Energy are the fundamental building blocks of the universe. At what point does a new idea merit a wikipedia page? I don't have a horse in the race, but I found the theory interesting so I started one that collected the basic information proposed in the theory. Clearly someone with more knowledge on particle physics than myself should probably be involved in drafting the article. Anyone interested in looking it over, giving constructive criticism, contributing? frey ( talk) 18:17, 15 December 2020 (UTC)
I have nominated Astrophysics Data System for a featured article review here. Please join the discussion on whether this article meets featured article criteria. Articles are typically reviewed for two weeks. If substantial concerns are not addressed during the review period, the article will be moved to the Featured Article Removal Candidates list for a further period, where editors may declare "Keep" or "Delist" the article's featured status. The instructions for the review process are here. Hog Farm Bacon 05:43, 23 December 2020 (UTC)
@ Carchasm: Carchasm ( talk · contribs) has been depopulating Category:Concepts in physics, removing many important articles from that category. Is this appropriate? JRSpriggs ( talk) 17:03, 22 December 2020 (UTC)
I would like to open up a discussion here on the "Langtons Ant Wave Equation", a derivation using the Telegraphers equation along with a circuit diagram and Octave script could be a starting point for our discussion, it would be great to have wikipedia responsible for increasing the IQ level of planet Earth. — Preceding unsigned comment added by Dakoder ( talk • contribs) 11:01, 28 December 2020 (UTC)
This is an archive of past discussions. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page. |
I PROD'ed the above. The article contains an equation that, as currently written, is fundamentally wrong on multiple levels; a discussion with the original author on the talk page makes it clear that the original author is quite unaware of the mistakes, or how to fix them. As this is an arcane topic (how to correctly couple spinor fields to torsion in gravitation), it seems highly unlikely that anyone will show up and fix this (especially since the article is misnamed, these are not your father's polar coordinates) and so PROD'ing for deletion seems like the only reasonable choice. Besides, Wikipedia already has other articles that already explain how to correctly couple spinor fields to torsion, so having an article on a confusing equation that cannot be explained is ... just wrong. 67.198.37.16 ( talk) 19:58, 22 November 2020 (UTC)
Anyone curious about obsolete theories of gravity? A while back, I took a look at the Whitehead's theory of gravitation article and put some effort into the prose and the referencing. As I recall, I thought about adding more details about the formulae, but then had a moment of "there's no good notation for this!" and tossed my hands in the air, figuratively speaking. Prompted by John Baez on the Talk page, I took another stab at it, but I'm sure it can still be improved upon. XOR'easter ( talk) 16:39, 1 December 2020 (UTC)
I find the notation hard to understand, but that's pretty common in Wikipedia articles so I'd say this is a big step forwards. Someday maybe I'll take a crack at understanding Whitehead's theory better and then I'll reread this and try to polish it up. Maybe someone else will beat me to it! John Baez ( talk) 18:30, 6 December 2020 (UTC)
In the wake of the the Mass dimension one fermions AfD, I thought that it might be worthwhile to figure out what the heck this ELKO thing is. I think I've found an answer; its an 8-component spinor (see below). A key issue is that the majority of the literature on it is incredibly disappointing, and is not written in a fashion that I find clear and coherent (see, however, exception below). Here's what I've been able to deduce so far:
I was deeply unhappy with the poor quality of the literature, until I found the eqn above. I'm planning to start a draft stub at Draft:ELKO Theory real soon now, which perhaps might be promotable to article space. Again, an invite to anyone who might want to explore more deeply. 67.198.37.16 ( talk) 20:07, 23 November 2020 (UTC)
There is a discussion in talk:proton about quark/gluon diagrams for the proton (and I presume others). The discussion suggests consensus here for any changes, though I don't see any discussion here. The discussion in Talk:Proton/Archive_1#diagram_of_quarks_in_proton seems to be a few years old. One question might be, how accurate should the diagram be? This one seems to allow quark-gluon, three-way gluon interaction, and four-way gluon interaction. Should the diagram show those? My original thought was to include both wavy-lines between quarks, and the wye diagram currently there in one diagram. (That is the combination of the two.) I don't think we have room for the infinite number of allowed diagrams. The current one seems to suggest only the three-way interaction. Gah4 ( talk) 00:47, 6 November 2020 (UTC)
Sorry for the late reply, I just now saw User:Gah4 and User:A. di M. and User:LaundryPizza03 comments above. By "at the same time", what I mean is that the Lagrangian for quarks has the generic form where psi is the quark field, and the A is the gluon field. The way this is to be read (if it is converted into a scattering amplitude, or an s-matrix) is that a quark comes in (the psi-bar) and either propagates ("wiggles around in a differential equation like way") (the partial symbol) or it hits (emits/absorbs) one and exactly one gluon (the A) and then it leaves (the psi). That's it -- comes in, hits one gluon, leaves. The Lagrangian for gluons has the generic form which can be read as saying "gluons propagate" (the partial-A part - one gluon comes in one goes out) or three gluons interact or four gluons interact (the products involving the [A,A] term.) The electromagnetic field does not have the [A,A] term, and so photons can only propagate. This three-gluon interaction is what makes gluons so unique and distinct (and is the reason for all the hoopla about Yang-Mills).
So here's the deal with the Delta diagram: with a suitable relablelling, and a suitable "time scale", it would also be an accurate diagram for Helium - one nucleus, two electrons, and some photons bouncing between the nucleus and the electrons, keeping the whole thing in a stable, bound state. The Wye diagram could never-ever describe Helium, because three photons just cannot interact in that Wye kind of way. The Wye is very unique to QCD.
For the "at the same time", for a helium atom, you could draw a diagram with 3 particles (nucleus, the two electrons) and 42 different photons going every which-way, but the photons must be two-ended: must always begin and end on the nucleus/electron. For QCD, you could draw a diagram with 3 quarks and 42 gluons, but now the gluons can bump into each other, so they form a big random network of wiggly lines. So, when you add time, this is how these diagrams differ. Anyway, that is why I like the Wye. The Delta for quarks isn't "wrong", its just maybe (mildly?) misleading, while the Wye diagram kills two birds with one stone... 67.198.37.16 ( talk) 04:20, 23 November 2020 (UTC)
I prodded this as unreferenced. It has sat without cites since 2007 and the title does not seem to appear anywhere outside of Wikipedia. It might be good content or it might be original research. I don't have the expertise to tell. - SimonP ( talk) 21:03, 9 December 2020 (UTC)
An editor, Luca-Spinor-Torsion, whose real name is Luca Fabbri, has added citations to his own papers in Dirac equation and De Broglie–Bohm theory. I've undone the edits. Tercer ( talk) 13:44, 10 December 2020 (UTC)
Big Freeze is currently up for discussion at RfD. I thought you might be interested.
Also, looking at wikt:en:Big Freeze#English, the definition on Wiktionary needs a rewrite. Anyone want to give it a try?
-- 67.70.26.89 ( talk) 11:02, 12 December 2020 (UTC)
/info/en/?search=Sudbury_Neutrino_Observatory has a dead link that would be an easy fix for someone who knows what they are talking about. The database for the original link HEP Spires was migrated to HEP Inspire. I left a note on the talk page but that might not be found this century, so I thought I'd put it somewhere in the Physics department. Hope someone can do the fix. Sorry if this was the wrong place to ask. Thanks. — Preceding unsigned comment added by 2600:1700:1c60:45e0:a9a6:aa4d:32ae:1bc4 ( talk • contribs)
Taking a guess, I accepted this to keep it from being deleted at 6 months. It would seem related to Jefimenko's equations, but I'm not at all an expert. I cannot tell if a merge is appropriate, or whatever, I leave it to the physics people here. DGG ( talk ) 00:09, 15 December 2020 (UTC)
Additional voices might be helpful over here:
Cheers, XOR'easter ( talk) 18:11, 11 December 2020 (UTC)
For the past week, an paper has been circulating about a theory that fragments of Energy are the fundamental building blocks of the universe. At what point does a new idea merit a wikipedia page? I don't have a horse in the race, but I found the theory interesting so I started one that collected the basic information proposed in the theory. Clearly someone with more knowledge on particle physics than myself should probably be involved in drafting the article. Anyone interested in looking it over, giving constructive criticism, contributing? frey ( talk) 18:17, 15 December 2020 (UTC)
I have nominated Astrophysics Data System for a featured article review here. Please join the discussion on whether this article meets featured article criteria. Articles are typically reviewed for two weeks. If substantial concerns are not addressed during the review period, the article will be moved to the Featured Article Removal Candidates list for a further period, where editors may declare "Keep" or "Delist" the article's featured status. The instructions for the review process are here. Hog Farm Bacon 05:43, 23 December 2020 (UTC)
@ Carchasm: Carchasm ( talk · contribs) has been depopulating Category:Concepts in physics, removing many important articles from that category. Is this appropriate? JRSpriggs ( talk) 17:03, 22 December 2020 (UTC)
I would like to open up a discussion here on the "Langtons Ant Wave Equation", a derivation using the Telegraphers equation along with a circuit diagram and Octave script could be a starting point for our discussion, it would be great to have wikipedia responsible for increasing the IQ level of planet Earth. — Preceding unsigned comment added by Dakoder ( talk • contribs) 11:01, 28 December 2020 (UTC)