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P. C. Spaniel's user avatar
P. C. Spaniel's user avatar
P. C. Spaniel's user avatar
P. C. Spaniel
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question
21
What new features does the Heisenberg Model have compared to the Ising Model?
Sep 14, 2016
question
21
Is the universe non-linear?
Dec 19, 2016
question
16
Why does Critical Points have fluctuations on all scales (Infinite correlation length)?
Oct 1, 2018
question
16
What is the Spectral Form Factor?
May 23, 2019
question
16
How do the infinite dimensional representations of the Poincaré group work?
Apr 16, 2017
question
14
Wick rotation vs. Feynman $i\varepsilon$-prescription
Jan 29, 2019
question
14
Is the Green function of electromagnetism a scalar or a tensor?
Oct 22, 2020
answer
13
How to deal with differentials?
Jul 31, 2023
question
10
Does the Hilbert space include states that are not solutions of the Hamiltonian?
Sep 17, 2016
question
9
Perturbation Theory and Thermodynamic Limit
Mar 24, 2018
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Quantum Supremacy: How do we know that a better classical algorithm doesn't exist?
11
Looking for a short story about human courage
9
When does Darboux's theorem on symplectic manifolds work globally?
6
Given three points $x_1$, $x_2$ and $x_3$ on a curved manifold, is it possible to define a triangle through the geodesics connecting them?