Physics
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AfterShave
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All Questions Answers
Score Newest
question
15
Why can we add counterterms?
Jan 6, 2019
answer
8
$\nabla$, $\cdot \nabla$, $\nabla \cdot$, $\nabla^2$ - What do they do?
Feb 18
answer
8
What is the mathematical relationship between the wave functions of QM and the fields in QFT?
Jan 12
answer
6
Why do we choose the Dirac delta function as the eigenstate of position operator?
Dec 27, 2022
answer
6
Why can Einstein coefficients be derived based on thermodynamically equilibrium relations when they are basically intrinsic?
Nov 1, 2022
answer
5
Two-loop renormalization Peskin and Schroeder
Oct 27, 2022
answer
5
Hamiltonian from Lagrangian defined as an integral
Mar 8, 2022
answer
4
Euler-Lagrangian equation of motion of quantum fields in QFT
Mar 1, 2022
answer
4
What constitutes a microstate?
Sep 19, 2022
answer
4
How can I compute $\langle x|e^{-a \hat{p}^{2}}| x^{\prime}\rangle$?
Mar 28, 2022

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