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Can someone please explain to me how the wave function of a Cooper pair is spherically symmetric?...
Asked on 10/04/2021 by dgwp
1 answerA star that initially produces energy through the $pp$ Chain will eventually exhaust its Hydrogen leading to a core contraction in order to increase the temperature to generate again...
Asked on 10/04/2021
1 answerIn Kepler's Third Law, the orbital period is described by $$T=2pisqrt frac{a^3}{mu}$$ where $a$ is the lenght of the semi-major axis. I wonder, why does the lenght of...
Asked on 10/04/2021
1 answerHow do I take a tensor products of $SO(N)$ irreps and decompose it in terms of irreps for $N>3$? (I understand the special case of $SO(3)$ we...
Asked on 10/04/2021
1 answerI can't sure what isotopes of silver(107 or 109) was used. But Silver has non-zero nuclear spin since the number of proton and neutron are not even. Since we use...
Asked on 10/04/2021 by min Fe
1 answerI'm studying the SSH model, here's the reference. I don't get what the definition of a topological invariant is in this case. I think the important property...
Asked on 10/04/2021
1 answerIn physics, can we legally add two physical quantities that behave differently under time-reversal or parity? For example, let $vec{a}$ and $vec{b}$ are two observables. Let $vec{a}$...
Asked on 10/04/2021
1 answerI am trying to learn some elementary EM, but I have some confusion about the basic concepts of steady current. Suppose I have a wire of uniform cross section area....
Asked on 10/03/2021 by julyfire
2 answerIn Srednicki pg.136, he derives the Schwinger-dyson equation from:$$0=delta Z(J)=iint Dphi , e^{i[S+int d^4y, J_bphi_b]}int d^4x(frac{delta S}{delta phi_a}+J_a)deltaphi_a.tag{22.21}$$ Then we apply $n$ functional derivatives wrt....
Asked on 10/03/2021 by YONGAO
2 answerViziv Technologies is a company that claims to be able to transform power delivery, signaling and safety. Their "Science" page says:The Zenneck surface wave is a technological...
Asked on 10/03/2021
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