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displacement operator mean different thing in Quantum Mechanics (see the book by Dirac)
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The comment(s) below were originally left at Talk:Displacement operator/Comments, and are posted here for posterity. Following several discussions in past years, these subpages are now deprecated. The comments may be irrelevant or outdated; if so, please feel free to remove this section.
The first formula:
exp[alpha*a - (alpha*)*(a+)]
should be:
exp[alpha*(a+) - (alpha*)*a]
i.e. annihilation (a) and creation (a+) operators should be swapped.
Last edited at 21:48, 14 October 2007 (UTC).
Substituted at 13:30, 29 April 2016 (UTC)
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