Talk:Spontaneous symmetry breaking
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A Lagrangian isn't even necessary for the process of spontaneous symmetry breaking. Neither is a vacuum. What's necessary is simply a solution to symmetric dynamical equations which isn't invariant under the same symmetries. Phys 19:04, 20 Feb 2004 (UTC)
- I have, as may be obvious, only an amateur interest in physics, so I'm sorry for my somewhat loose explanation. I put in the Lagrangian bit so that I could provide a more concrete example of spontaneous symmetry breaking, and also because this is how I learned about it. I have reworded the article ("one way of seeing" instead of "is accomplished by") in order to be more accurate. If you have further suggestions for restating it, I definitely welcome them. Thanks for the input. Jcobb 05:12, Feb 21, 2004 (UTC)
Is it supposed to be the lagrangian or the lagrangian density? The lagrangian is generally not lorentz invariant. JeffBobFrank 23:43, 19 Mar 2004 (UTC)
- Technically you are correct that it is more accurately described as the Lagrangian density. However, as can be seen in the Lagrangian article itself, many different entities end up being called just the plain Lagrangian (for another example the n-form L dx^0 wedge dx^1 wedge ... wedge dx^n is also commonly described as the Lagrangian even though it is something slightly different). In the context of this article, I don't think it is necessary to make the distinction between Lagrangian and Lagrangian density. Jcobb 07:53, Mar 21, 2004 (UTC)
What's wrong with my example on the Earth's gravitational field? It's not a scalar field, but it's still an example, one everyone is familiar with. Phys 00:20, 15 Aug 2004 (UTC)
- What's the example with Earth's field? Wilgamesh 21:14, 17 Sep 2004 (UTC)
Well, you know, you've been around WP long enough to catch on to the requirements of the articles. It may have had a point to make, but it certainly didn't make it clearly. Please don't add chat to articles when it really belongs to the talk page.
Charles Matthews 08:33, 15 Aug 2004 (UTC)