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This tag is for questions on the meaning, history, and usage of various symbols and notation that are used to denote different quantities in physics. Don't forget to mention the reference, where you encountered those notations.
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Action of Conjugate momentum $\hat{\pi}$ on $\hat{\phi}$ eigenstate [duplicate]
So I am trying to solve ex. 14.3 in Schwartz textbook "Quantum Field Theory and the Standard Model"
and in the second requirement, he wanted me to show that the action of the conjugate momentum operat …