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I'm reading and trying to understand the paper by Diehl, S., Rico, E., Baranov, M. et al. "Topology by dissipation in atomic quantum wires". Nature Phys 7, 971–977 (2011). ...
Asked on 11/08/2021
0 answerGiven the standard geodesic equation:$$frac{d^2 x^mu}{dlambda^2}+Gamma ^mu _{sigma rho}frac{d x^sigma}{d lambda}frac{d x^rho}{d lambda}=0$$we want to apply it to the Schwarzschild metric; conceptually this simply means using the...
Asked on 11/08/2021
1 answerIt is given in my textbook and one other book(that I got from the library) that:-...The earth has a magnetic dipole of dipole moment about $8.0times 10^{22} mathbf{ J.T^{-1}}$The...
Asked on 11/08/2021
1 answerIf its number of particles of a particular type is not conserved then it has zero chemical potential. Photon number is not conserved. Hence, it has zero chemical potential. We...
Asked on 11/08/2021
1 answer$$O=expleft(x^TAx +x'^T B x'+x^TCx'+x'^TDxright)$$ Where $x^T=(x_0,x_1,..,x_{n-1})$, $x'^T=(x'_0,x'_1,..,x'_{n-1})$ and $A,B,C,D$ are complex square $ntimes n$ matrices. The column matrices x and x' consists of real entries....
Asked on 11/08/2021
0 answerThe current through a capacitor as a function of time is given by; $$i(t)=Ccdot frac{d}{dt}U(t)$$ When assuming that the capacitance $C$ does not vary with time. But what...
Asked on 11/08/2021 by Vinzent
2 answerIf the wing of an air plane is cuboidal in shape, and that the Earth's magnetic field $bf{B}$ is uniform in the neighbouring volume of the plane, does that...
Asked on 11/08/2021
1 answerI've seen this question asked a few times on Stack Exchange, but I'm still quite confused why the following "contradiction" seems to arise. By definition:$(Lambda^T)^{mu}{}_{nu} = Lambda_{nu}{}^{mu}$$Lambda^T eta...
Asked on 11/08/2021
5 answerA previous post (What Is Energy? Where did it come from?) defines work qualitatively as "a process in which energy is transformed from one form to another form". And...
Asked on 11/08/2021
7 answerOne can calculate the Reynolds number to determine whether or not flow is turbulent or not inside a pipe with circulating water. The formula is: $Re = frac{rho VD}{mu}$...
Asked on 11/08/2021
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