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I have been trying to follow the derivation in [Ref. 1] so as to better understand the theory of Electric Dipole Spin Resonance (EDSR) in materials which experience Spin-Orbit Coupling...
Asked on 08/13/2021
0 answerThe Schwarzschild spacetime is described by $$ds^2=-(1-frac{r^*}{r})c^2dt^2+(1-frac{r^*}{r})^{-1}dr^2+r^2dtheta^2+r^2sin^2theta dphi^2,$$ where $r^*$ is the Schwarzschild radius. The advanced Eddington-Finkelstein (EF) coordinate system is a transformation of the Schwarschild coordinates...
Asked on 08/13/2021
1 answerI'm trying to apply Wald's General Relativity equation $3.1.14$: $$nabla_a{T^{b_1dots b_k}}_{c_1dots c_{ell}}=overline{nabla}_a{T^{b_1dots b_k}}_{c_1dots c_{ell}}+sum_i{C^{b_i}}_{ad}{T^{b_1dots ddots b_k}}_{c_1dots c_{ell}}-sum_j{C^d}_{ac_j}{T^{b_1dots b_{ell}}}_{c_1dots ddots c_{ell}}$$ to the covariant derivative of a 2-form, and...
Asked on 08/13/2021 by FonerBalear
1 answerUndergraduate classical mechanics introduces both Lagrangians and Hamiltonians, while undergrad quantum mechanics seems to only use the Hamiltonian. But particle physics, and more generally quantum field theory seem to only...
Asked on 08/13/2021
8 answerI want to explicitly write out the Lagrangian term$$operatorname{Tr}bigg( sum_{Ineq J}[phi^I,phi^J]^2bigg) ,$$where $I,J$ are flavor indices and $phi$ is a scalar field. Why doesn't this...
Asked on 08/13/2021
1 answerI'm modeling the following problem: A rigid body (line) with density of mass $m_0$ (mass/length) with a pivot point in the middle, inside a fluid. The boundaries of the...
Asked on 08/13/2021
1 answerI have this setup. It consists of a battery of no internal resistance with voltage $V$ and a...
Asked on 08/13/2021 by user8718165
6 answerIf I want to know the expectation value of an operator O in the quantum trajectory formalism, I average over $N$ trajectories, where I call one such trajectory ...
Asked on 08/13/2021
1 answerI have seen gravity action being written in terms of spin-connection and the vierbeins. Has anyone attempted to write the gravity action in terms of Null-tetrads?...
Asked on 08/13/2021
0 answer$$Ipropto frac{sin^2(Ndelta)}{sin^2(delta)}$$ Where $N$ is the number of slits and $delta$ contains the angle, wavelength and slit spacing dependence. In the limit as $delta to 0,...
Asked on 08/13/2021
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