Talk:Coupling (physics)

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Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 18:34, 16 January 2022 (UTC)[reply]

besides this artice needing to be written, are we referring to the quantum mechanical coupling corresponding to the interaction between particles, such as a electron and a photon, or two quarks? if so,this phenomena is not really considered to fall under "quanum mechanics" as it is the basis for QED, QCD and similar fields. Clarification with someone with knowlege in this subject would be very helpful Pjbeierle (talk) 16:13, 9 June 2010 (UTC)[reply]

How do we know when fields are "coupled"? The only useful part of this article is the first sentence:

"In field theory (physics), two fields are coupled if they are interacting with each other."

The rest are just empty headings. Maybe Lagrangian densities could be brought in, they give an indication of when two fields are non-interacting (when the Lagrangians are separable into a sum of Lagrangians, one for each field) or interacting (unseparable because of interaction terms). I don't think this is always true, but it should be for most cases. M∧Ŝc²ħεИ_τlk 10:34, 2 January 2017 (UTC)[reply]