pines-demon's latest activity
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Ppines-demon replied to the thread I Deriving Bogoliubov transformations correctly.Actually according to various sources, Bogoliubov transformations of the boson operators (not of the states), are symplectic. See for...
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Ppines-demon replied to the thread I Deriving Bogoliubov transformations correctly.The line you are citing is for bosons, obviously differs from that of fermions.
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Ppines-demon replied to the thread I Deriving Bogoliubov transformations correctly.Calculating just ##U^\dagger## does not give the correct diagonalization for the BCS Hamiltonian, you can check. Edit: why the...
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PWhich Feynman book/paper/lecture are you working from? Until you tell us that, we won’t know what’s in the figures that you’re asking...
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PEverytime that I deal with Bogoliubov transformations I get some sign wrong or a missing assumption. Let's take the case for fermions...
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Ppines-demon reacted to renormalize's post in the thread Prove that the integral is equal to ##\pi^2/8## with
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It turns out that this very integral was posted 5 days ago on Mathematics Stack Exchange by "Dan" (is that you @Meden Agan ?)... -
Ppines-demon replied to the thread Prove that the integral is equal to ##\pi^2/8##.Is an instructor for an undergrad course? is the integral physics related? Is it a course of math, physics or something in particular...
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Ppines-demon replied to the thread Prove that the integral is equal to ##\pi^2/8##.So what is the context? Where you playing with numerics?
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Ppines-demon replied to the thread Working in the patent field.Welcome! I instantly imagined patent officers as quantized excitations of the patent field. :oldbiggrin:
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Ppines-demon replied to the thread Prove that the integral is equal to ##\pi^2/8##.What is the actual statement or context of this integral? Does it explictly say that it can be calculated using Fubini's theorem? Or is...