pines-demon's latest activity
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Ppines-demon replied to the thread I Bob and Alice with a Bell pair.This is PF, we ask you to first look it up and show us what you have done so far before commenting on it.
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Ppines-demon reacted to Demystifier's post in the thread A Challenge to Bohmian mechanics by Sharoglazova et al, Nature, 2025 with
Like.
Here it is: https://arxiv.org/abs/2507.08049 -
Ppines-demon reacted to Demystifier's post in the thread I What's the deal with instantons? with Like.
What one really wants to compute is the tunneling amplitude between different vacua. Computing it exactly is complicated, so one uses...
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PI am reading Blundell and Lancaster and I am still lost to what they want me to understand about instantons. So I get the following...
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Ppines-demon replied to the thread History Interesting anecdotes in the history of physics?.I think it was already mentioned by you in post #161 :oldbiggrin:
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Ppines-demon replied to the thread History Interesting anecdotes in the history of physics?.When Bardeen was wrong John Bardeen was one of the giants of solid state physics, up to this day the only person with two Nobel Prizes...
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Ppines-demon reacted to Demystifier's post in the thread A Challenge to Bohmian mechanics by Sharoglazova et al, Nature, 2025 with Like.
Yesterday I have submitted a "Comment" (in Nature it is called Matters Arising) to Nature related to this paper. Today I have also...
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Ppines-demon reacted to dextercioby's post in the thread I Dirac's 1972 Boston talk on Projective geometry in quantum mechanics with Like.
What about the talk itself? Where can one find it?
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Ppines-demon reacted to robphy's post in the thread Prove that the integral is equal to ##\pi^2/8## with Like.
With some context (e.g, a plot or some geometric figure), there may be symmetries that could be exploited to simplify the calculation...
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Ppines-demon replied to the thread I Deriving Bogoliubov transformations correctly.Thanks, I love how precise the derivation is in this book, it solved another doubt that I had. However it starts with the ad-hoc...
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Ppines-demon reacted to Demystifier's post in the thread I Deriving Bogoliubov transformations correctly with
Informative.
Check out the book Grosso, Pastori Parravicini, Solid State Physics, Sec. 18.4.1 The Bogoliubov Canonical Transformation. The... -
Ppines-demon replied to the thread I Deriving Bogoliubov transformations correctly.Mmhm I see your point, however I still think there is something beyond the ad-hoc response. Note that once you fix ##c_p##...
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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...