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:In physics, a quantum leap or quantum jump is a change of an '''electron''' from one energy state to another within an atom.
Is it certain (no puns please) that it '''has''' to be an electron? Fluxons, spinons and other phenomena can also exhibit a discontinuous quantum transition, a leap. --20:12, 27 March 2007 (UTC)
Many standard quantum mechanics textbooks, such as Merzbacher, and Landau and Lifshitz, use the term "electron" for brevity and concreteness when referring to some quantum mechanical object, although they mention this explicitly in a footnote within the first few pages.[[User:131.111.213.41|131.111.213.41]] 14:38, 4 November 2007 (UTC)
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