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I could not find what is the probability density and the probability current density of one-dimensional Schrödinger equation units?...
Asked on 08/09/2021 by ece
3 answerI did lot of searching but couldn't find any textbook nor any webpage which could clarify my doubt. Maybe my doubt is insanely stupid and I was dumb for not...
Asked on 08/09/2021 by Yashas
3 answerI am designing an interferometer for an experiment. The setup consists of (1) the laser source, (2) the interferometer itself (consisting of optical components and photodetector(s), and (3) the target...
Asked on 08/08/2021
1 answerWhen one writes down RG-Flow equations for any theory, at some point one encounters statements like"It is useful to properly rescale the above exact flow equations and rewrite them in...
Asked on 08/08/2021
0 answerWhat should be an intuitive way to start thinking when I need to compute the expectation value of $e^{frac{i f(t)}{2} sigma^z_1 sigma^z_2 }$? Do I need to expand...
Asked on 08/08/2021
1 answerWhat is the difference, if any, between kinetic momentum $p=mv$ and canonical momentum? Why is canonical momentum important (specifically to classical field theory)?...
Asked on 08/08/2021
3 answerIs there a standard way for me to isolate 2 of N bands of a general $Ntimes N$ Hamiltonian? That is, I want to make a $2times 2$...
Asked on 08/08/2021
1 answerInterferometry relies on the change in the phase of two orthogonal light beams reflected back to the source point. Assume there is an interferometer at the equator, one mirror is...
Asked on 08/08/2021
1 answerThe Lehmann representation of the Green function to a system with $N$ identical particles can be write as $$G(textbf{x}, textbf{x}', E) = sum_{n} frac{langle Psi_{0}^{N} | psi(textbf{x})| Psi_{n}^{N+1}...
Asked on 08/08/2021
1 answerIn many articles, authors compare physical dualities to Fourier transforms. For example:Joseph Polchinski, in his article "String Duality" (hep-th/9607050v2), writes: "Weak/strong duality [...] is similar to a Fourier transform, where...
Asked on 08/08/2021
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