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8 votes

Use of eigenvalues of operators in quantum mechanics

Comments to answer: the question is hard to answer because, there is more than one question and more than a way to interpret it. If the question is when discrete values and eigenvalues were introduced ...
Mauricio's user avatar
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4 votes

Use of eigenvalues of operators in quantum mechanics

The story is long and quite complicated. Here is a very short and necessarily incomplete sketch. It begins with experimental observations about atomic spectra. The main fact is that each atom has some ...
Alexandre Eremenko's user avatar

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