Talk:Ground state

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Non-Sequitor? I guess you meant Non-SequiTUR? why is a question mark appearing there? is that argument valid, doubtful or invalid? I am working in the spanish translation of this article, see the languages available. I've added to the spanish version two important concepts about the ground state, those are: BECs, and also the importance of it, in quantum mechanics, specially about the creation of quantum machines, and quantum teleportation. — Preceding unsigned comment added by Javiergarcia928 (talk • contribs) 05:16, 29 August 2011 (UTC)[reply]

It does not follow: the log of 1 appears in this article without reference to any sort of equation or calculation. The arccos(1) is zero too, so what?

99.160.222.116 (talk) 03:22, 7 April 2012 (UTC)[reply]

In the presence of degeneracy, does the term "ground state" refer to any state supported on the lowest-energy eigenspace, or only to the maximally mixed state on that subspace? The article is a bit contradictory on this point, by making both of the following statements:

• "If more than one ground state exists, they are said to be degenerate",
• "a system at absolute zero temperature exists in its ground state; thus, its entropy is determined by the degeneracy of the ground state".

(Emphasis mine.) - Saibod (talk) 12:11, 27 May 2016 (UTC)[reply]

In the proof we find "constant for {\displaystyle x\in [-\epsilon ,\epsilon ]} {\displaystyle x\in [-\epsilon ,\epsilon ]}. If {\displaystyle \epsilon } \epsilon is small enough then this is always possible to do so that {\displaystyle \psi '(x)} \psi '(x) is continuous. "

This looks to me like somebody writing outside their native language. The "possible to do so that," is it Russian? German? This is an ordinary delta-proof, where the language in English would usually be that "it is always possible to choose epsilon such that the whole shebang comes out within delta of such-and-such."

I don't want to change it and screw it up further. Could somebody more competent please fix?

David Lloyd-Jones (talk) 11:18, 9 February 2017 (UTC)[reply]

The context of this topic is not introduced in the article.

For the formulas, all symbols should be defined in the article or with a direct link.

Jfitch ca (talk) 18:40, 4 April 2022 (UTC)[reply]