Questions tagged [dirac]

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Dirac's non-neglibile disturbances argument and epistemic quantum mechanics

Here is Dirac's argument about one reason to motivate quantum mechanics: "It is usually assumed that, by being careful, we may cut down the disturbance accompanying our observation to any desired ...
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Why is Dirac delta named after Dirac when the concept was already over two centuries old?

Please explain why the Dirac delta function was named after Dirac, who lived in the 20th century, and what was so special about it. I ask this because it is used in Green's function which pre-dated ...
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Was Dirac really trying to take the square root of the Klein-Gordon operator?

As a student of physics one will, on several occasions, indubitably hear professors or other physicists (here is an example, from Physics.SE's highest-rep user John Rennie) tell the famous story that ...