Talk:Skyrmion

message: "where SU(N)L and SU(N)R are the left and right parts of the SU(N) matrix"
There is no such thing as left and right part of an SU(N) matrix. The group in question is a direct product and the left and right parts refer to the subgroups of the direct product isomorphic to the two SU(N) factors. The origin of this is the approximate flavor chiral symmetry present in the quark model.  — Preceding unsigned comment added by Moribana (talk • contribs) 16:35, 21 January 2014 (UTC)
replies: text: Yep. See comment below. The left and right parts refer to the two inequivalent but still isomorphic fundamental representations of the Lie algebra. Why there are two, and why they are inequivalent but isomorphic is a topic from the representation theory of Lie algebras, and that is a rather deep and complex topic on it's own. So technically, the original wording was fine: there actually are two parts. It was just a bit poorly stated. 67.198.37.17 (talk) 03:47, 5 July 2017 (UTC)
thread_title:  Wrong concept 

message: The second sentence ("It arises ... the diagonal subgroup") is ungrammatical and therefore uninterpretable. A full sentence could end grammatically after "(the structure group)", but then there is a dangling part that has no discernible grammatical relationship with the rest. --LambiamTalk 07:11, 25 August 2006 (UTC)
replies: text: No kidding, does anyone know enough about the topic to discern what is trying to be said?Millertime246 (talk) 22:15, 29 October 2011 (UTC)
replies: text: Its the diagonal vector subgroup of the chiral group. (as opposed to the axial vector subgroup). I don't understand what the problem is. 67.198.37.17 (talk) 03:49, 5 July 2017 (UTC)
replies: text: Oh. I see the confusion. There are two inequivalent but isomorphic fundamental representations of the Lie algebra. They are charge-conjugate to each other. Getting into the representation theory of Lie groups is a bottomless pit. But, to keep it short, in physics, these two are used to represent particles and anti-particles (e.g. that's why there are three quarks in QCD: they are the roots of the root system for SU(3).) The Littlewood-Richardson coefficients (aka Clebsch-Gordon coefficients, when its su(2)) tell you how to combine different representations; here, they are used to combine left and right into a vector current (the rho meson), and an axial vector current. Articulating all of this "common knowledge" is way beyond the scope of this article. Unfortunately, this "common knowledge" is also exactly what pretty much everyone doesn't quite get, and I don't know what to do about that. 67.198.37.17 (talk) 05:44, 5 July 2017 (UTC)
thread_title:  Ungrammatical sentence 

message: See many papers on skyrmions in graphene, from the past decade: http://arxiv.org/pdf/1202.6047.pdf  .  Also needs a link to Tony Skyrme. – SJ + 19:59, 21 September 2012 (UTC)
thread_title:  graphene references 

message: Is there a layperson's explanation (whatever that means here) of the term "hollowed-out" skyrmion? Jimw338 (talk) 17:32, 12 November 2019 (UTC)
thread_title:  "Hollowed-out skyrmion"? 

message: A meron is a a second-order half-skyrmion https://scitechdaily.com/second-order-optical-merons-or-light-pretending-to-be-a-ferromagnet/
Maybe worth to mention.
--Ernsts (talk) 15:21, 2 March 2021 (UTC)
thread_title:  Meron 

message: There really needs to be something explaining where the name comes from. Without that it feels like turboencabulator language to me. Hellbus (talk) 01:28, 26 April 2021 (UTC)
thread_title:  Etymology