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In most texts on GR we are first introduced to a formal and rigorous definition of a manifold. We then learn the point that in GR "any coordinate system" might...
Asked on 02/18/2021 by user56963
1 answerSuppose I have a standard, partially filled bottle of distilled pure water (filled up to around 75%) that's open to the environment at room temperature and pressure. Now suppose I...
Asked on 02/18/2021
0 answerBackgroundIn this paper the author studies the BdG equation for a metal-superconductor-metal system. The left metal is electron doped and is in the region $x<0$, the...
Asked on 02/18/2021
0 answerIn cosmology the deceleration parameter defined as the $$q_0 = frac{1}{2}sum_iOmega_{i,0}(1+3w_i)$$ Is there a similar expression for the jerk parameter ($j_0$)?...
Asked on 02/18/2021
1 answerI'm trying to understand magnetohydrodynamics, in particular the Cauchy momentum equation ${displaystyle rho left({frac {partial }{partial t}}+mathbf {v} cdot nabla right)mathbf {v} =mathbf {J} times mathbf {B} -nabla p.}$...
Asked on 02/18/2021 by Teabelly
1 answerSOC term is:$$H_{mathrm{SOC}}=alpha vec{L} cdot vec{S}=frac{alpha}{2}left(L^{+} sigma^{+}+L^{-} sigma^{-}+L^{z} sigma^{z}right)$$from spin Orbital Coupling matrix in p-orbital basis, we know that the matrix elements between orbitals with different...
Asked on 02/18/2021 by Merlin Zhang
0 answerWhen a sound source moves, frequency perceived by the observer is changed due to the doppler shift. Does this apply to intensity too? If yes then how. Thanks!...
Asked on 02/18/2021 by rockin numbers
1 answerAssume that we have electronic band structure and want to calculate Berry phase following the red line: If we have energy...
Asked on 02/18/2021 by user42298
1 answerAbout 1905 Einstein published a work about diffusion of hard spheres and Brownian motion. One effluence of that is the so called "viscosity equation" which was/is very important for determining...
Asked on 02/18/2021 by Georg
2 answerNow earth is revolving around the sun with velocity of 29784.5029m/sand its velocity can be calculated from $v=sqrt{frac{GM}{r}}$ .How about earth's velocity suddenly changes into 25000m/s ,...
Asked on 02/18/2021 by Junyeong
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