# Dirac paper quoted at Wikipedia

From Wikipedia's http://en.wikipedia.org/wiki/Uncertainty_principle:

In 1936 Dirac offered a precise definition and derivation of the time-energy uncertainty relation in a relativistic quantum theory of "events".

The citation to the paper is missing. Can anyone provide the title of this paper and where can I find it? Thanks.

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Dirac's famous book "The Principles of Quantum Mechanics" has a chapter on the uncertainty relation. –  mtrencseni Sep 30 '11 at 10:32

The reference is to the "many-time" formalism which was influential for Feynman Schwinger and especially Tomonaga. It gives the evolution in an interaction picture. I never read the reference, I heard Tomonaga mention it. It's from 1932, not 1936, and Tomonaga writes a follow up in 1946. See the first page of this reference: http://www.springerlink.com/content/nwq557633112kxk2/.

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It could be this one, although the person who wrote that paragraph should have provided the reference him/herself:

This was obtained from the SAO/NASA Astrophysical Data System. Please note that for that year (1936) this "search engine" also provides another paper by Dirac but at a glance it doesn't seem to be the one you're after.

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springerlink.com/content/nwq557633112kxk2 says the year is 1932, and gives the other references. –  Ron Maimon Sep 30 '11 at 17:26
Also, I wrote that paragraph. –  Ron Maimon Nov 5 '11 at 1:04

The discussion in Dirac's book only pertains to the position-momentum uncertainty relation; the question is about the time-energy uncertainty relation which is claimed by many (e.g. Bohm & Aharanov http://148.216.10.84/archivoshistoricosMQ/ModernaHist/Aharonov%20a.pdf) to be fundamentally different.

The reference that I have just given is known to the becko because it's from the Wikipedia article that he cites. Others might like to read it (I mean try to read it).

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