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In the paper, Development of an Aerodynamic Model and Control Law Design for a High Altitude Airship I found a passage that makes no sense to me....
Asked on 06/05/2021 by myNewAccount
2 answerI would like a clarification on the difference between Landau-Ginzburg theory and Landau theory for phase transitions. On one hand, I see some books...
Asked on 06/05/2021
0 answerI'm working as a Laser physicist and we are trying to build/develop a passively Q-switched Laser. The only problem is that the energy stability is not satisfying for the customers...
Asked on 06/05/2021 by LLanadas
0 answerI randomly stumbled over a tiktok about Space-time curvature (very scientific I know, but I think the visualization it contains is a good one): https://vm.tiktok.com/ZMeBQch2r/ Now, the...
Asked on 06/05/2021
2 answerWhen we talk about vacuum polarization in effects like the Lamb Shift, what is actually being polarized? What effects does it have?...
Asked on 06/05/2021
1 answerSo I have read that if you calculate feynman diagrams with an $iepsilon$ prescription, that is with propagators of the form $frac{i}{p^2-m^2+iepsilon}$ then you get the standard ...
Asked on 06/05/2021
0 answerThe density of electron states in a 3D semiconductor is given by $rho(E)=frac{1}{2pi^2}left(frac{2 m^*}{hbar^2}right)^{3/2}sqrt{E}$, derived commonly as shown here. I'm trying to understand how to set...
Asked on 06/05/2021 by ttshaw1
0 answerIn a typical (simple, 1D) Ising model, we have $$mathcal{H}=-frac{J}{2} sum_{langle i, jrangle} sigma_{i} sigma_{j}-B sum_{i} sigma_{i}, quad sigma_{i}=pm 1$$ However, what is the typical value of $J$...
Asked on 06/05/2021
0 answerWhenever you see anomalous Hall effect resistivity/conductivity vs. external magnetic field curves, there is always some low-field part with a greater slope that changes to a lesser slope at some...
Asked on 06/04/2021
1 answerI understand how the field lines enter and leave the gaussian surface. But my concern is that the field isn't constant everywhere on the gaussian surface, i.e, there exactly doesn't...
Asked on 06/04/2021 by AMISH GUPTA
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