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"Below some extremely high temperature, the field causes spontaneous symmetry breaking during interactions."

Spontaneous symmetry breaking of what?

Betaneptune (talk)16:12, 22 April 2021 (UTC)betaneptune[reply]

I've been trying to understand the related section 'Simple explanation of the theory, from its origins in superconductivity', which is anything but simple, I'd call it incomprehensible. Here's my attempt at explaining it. A superconductor according to BCS is an organised collection of Cooper pairs, each of which according to QM would be a system with an arbitary phase (in other words, the state is a constant function times an arbitary phase factor). When we put these pairs together as per BCS we get a state that (as in the model of Gor'kov) has an order parameter which also has a phase factor (as featured in the theory of Ginzburg and Landau, which had no theoretical basis and was just designed to fit experiment). There'd be a symmetry property which would make the properties independent of the phase. It looks as if what the Higgs does is to complicate matters so that the phase symmetry is lost, and this also means that the excitations of the system develop a mass. This as noted accords with Goldstone's connection between symmetry breaking and mass.
OK, it's not that simple, but I hope it makes more sense to people than the obscure current version.--Brian Josephson (talk)22:03, 9 February 2023 (UTC)[reply]

Npettiaux, I have undone your move of this article to Brout–Englert–Higgs–Guralnik–Hagen–Kibble mechanism. Potentially controversial moves must not be done without discussing first. SeeWikipedia:Requested moves/Controversial. Note that changing the article name has come up before. Wikipedia articles use the most commonly used name for a topic, which may not be the "official" name. SeeWP:COMMONNAME.StarryGrandma (talk)23:12, 2 October 2022 (UTC)[reply]

In various places it is suggested in the article that the Meissner effect in superconductivity is associated withshort range interactions. I'm not aware of it ever having been thought of in these terms, but rather that (as per the Londons' equations) there is a surface current layer that screens the field from the interior, just like the skin effect that occurs at high frequencies in ordinary metals. --Brian Josephson (talk)22:12, 9 February 2023 (UTC)[reply]

The Higgs is introduced as an SU(2) doublet, and in the subsection 'The photon as the part that remains massless' it is emphasized that SU(2) acts on a complex 2-dimensional vector space. But then the article immediately goes on to talk about the action of 'rotation about x,y,z axes'. What x,y,z axes?? Presumably this is implicitly(!) under the isomorphism between SU(2) and the double cover of SO(3)?

This seems like an incredibly confusing way to put it!Sloth sisyphos (talk)23:03, 3 March 2025 (UTC)[reply]

isn't it Brout-Englert-Higgs mechanism ?2001:6A8:3081:4F02:2196:4BAA:F0E2:9779 (talk)08:17, 21 March 2025 (UTC)[reply]

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