Recent content by forcefield

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    Today I Learned

    Yes, "Se on tammea" means that it is made of oak. I wondered because all your other Finnish sentences were correct. My main point though was related to the usage of the words "mikä" and "mitä".
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    Today I Learned

    Not completely. In your context, yes. Was that a typo? "Tämä on tammi" could be answer to "Mikä tämä on?" One can also say "Se on kahvia mikä maistuu hyvältä" ( "It's coffee which tastes good" ). One would not say "Se on kahvia mitä maistuu hyvältä". Right.
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    I Is this a typo? (Quantum Theory for Mathematicians by Brian C. Hall)

    Why is there no Coulomb's constant in (1.3)? Btw, AFAIK this is all classical physics.
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    Other Compilation of severe errors in famous textbooks

    Note that Feynman is there not talking about Bell's hidden variables but about (electron's) inner variables. It's not the same thing.
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    I Is Free Will a Foundational Assumption in Quantum Theory?

    No, IMHO the perfect correlation in the Bell experiment is a kind of superdeterminism. One can always try to explain the weird correlation away, for example through FTL influence (without free will).
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    B Interaction of light with atoms

    Reflection/refraction happens at all frequencies while absorption/emission only happens at certain discrete frequencies.
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    I What makes the interpretations of Quantum Mechanics so important?

    I can only guess what he means by the "quantum laws" and even then only vaguely. Could you please elaborate on my question then ?
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    I What makes the interpretations of Quantum Mechanics so important?

    From the Feynman Lectures here: "As we apply quantum mechanics to larger and larger things, the laws about the behavior of many atoms together do not reproduce themselves, but produce new laws, which are Newton’s laws, which then continue to reproduce themselves from, say, micro-microgram size...
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    I What makes the interpretations of Quantum Mechanics so important?

    How does that relate to saying that there is a nearly infinite number of laws that change when the scale (or size/complexity) changes until Newton's laws ?
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    A What does the first ever photo of quantum entanglement look like?

    I hesitate to contribute to an advanced thread but their definition of "realism" in the context of what Bell proved does not seem to be right. This is what they say: "A theory obeys realism if measurement outcomes can be interpreted as revealing a property of the system that exists independent...
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    A Starting with the Schrodinger equation, how do we find the Hamiltonian matrix?

    I think Feynman's "the Hamiltonian matrix" in chapter 8 is about Heisenberg's matrix mechanics.
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    B Is 3x=15 Really That Hard to Solve?

    No, I can start with nothing, add 3 x times until I arrive at 15. Then I just have to remember how many times I added 3. This is very fundamental starting from definitions. x = 15/3 follows from the definition of division. Of course you can just divide both sides by 3.
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    I Exploring the Connection between Trigonometric and Exponential Functions

    Only if one wants e^{i0} \equiv 1
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    B Quantum Entanglement: Explaining the Logic Behind It

    Why does it always matter whether a small error is systematic or not?
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    B Quantum Entanglement: Explaining the Logic Behind It

    But if the errors are not significant, then I don't see a reason to dismiss the results.
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