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I attended a lecture given by Professor Wen Xiaogang.In the lecture, Prof.Wen gave an example of topological excitation: For a state $$(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)(uparrowdownarrow)tag{1}$$,if it's excited into such a...
Asked on 10/12/2020 by xiang sun
1 answerIf two neutrinos are entangled somehow--say, for instance, by being created in the same reaction--would their flavor (Tau, Muon, Electron) be enangled, including in their oscillations between the three? As...
Asked on 10/12/2020 by Sciencemaster
1 answerIsn't the pentavalent impurity atom positively charged and attracting the electron? On receiving the energy why doesn't the electron create a hole in the valence band as it moves to...
Asked on 10/12/2020
1 answerWikipedia's Mie scattering Mathematics discusses the scattering amplitudes $S_1(theta), S_2(theta)$ for each outgoing polarization of an incident EM plane wave on a uniform sphere. It...
Asked on 10/12/2020
1 answerWhen computing the volicty of a particle moving along a curve parametrized by $Z^i(t)$ for each component i, the components of the velocity $V^i$ are given by $$V^i = (d/dt)Z^i$$...
Asked on 10/12/2020 by Slayer147
2 answerThe Coriolis force acts in a direction perpendicular to the rotation axis and to the velocity of the body in the rotating frame and is proportional to the object's speed...
Asked on 10/12/2020 by WigbertPowrr
2 answerWill the Magnetic flux through the solenoid be equal to 0 if the number of layers is even ( due to opposite direction of current of the adjacent layers)?...
Asked on 10/11/2020 by Derby Moose
1 answerIn a superconductor, the coherence length is the mean distance between two electrons in a Cooper pair. How is the coherence length experimentally measured?...
Asked on 10/11/2020 by pchenweis
3 answerI have synthesized an $n$-type semiconductor material $text{ZnO}$. Under light illumination, its resistance keeps increasing. What are the reasons for this?...
Asked on 10/10/2020 by Sonia T
1 answerIs there a way to rigorously derive the minimal coupling hamiltonian for a system interacting with electromagnetic radiation. How de we arrive at the expression:$$hat{H} = frac{1}{2m}(p-frac{q}{c}A)^2 +...
Asked on 10/10/2020
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