Recent content by planck999

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    Graduate Deviations from classical action and D’alembert's principle, why is D’alembert's principle not applicable to QM?

    Thanks for your explanation. Then, a non stationary path cant create weird phenomena in gr, like a non inertial geodesic. Anything beyond this goes to attempts trying to unify qm and gr and there is still no validated answer for that.
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    Graduate Deviations from classical action and D’alembert's principle, why is D’alembert's principle not applicable to QM?

    I misunderstood one thing in path integral formulation I guess. Meaning of different phases cancel out at macroscopic level isn’t all paths are present but it collapses into one of them thing, its more like all paths are present and their superposition is the only observable we get out of them...
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    Graduate Deviations from classical action and D’alembert's principle, why is D’alembert's principle not applicable to QM?

    And, we interpret non stationary phases physically in an intuitive manner. What would be the meaning of non dlamabertian paths? And in a non stationary path how would light bending in an inertial elevator thought experiment work?
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    Graduate Deviations from classical action and D’alembert's principle, why is D’alembert's principle not applicable to QM?

    Because action principle does apply to r and q. And it gives the same results with action principle. Also, its derivation doesnt compeletely depend on newtonian mechanics, it should be valid for arbitraty coordinates such as fields. I asked because in qm there are non stationary paths. So...
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    Graduate Deviations from classical action and D’alembert's principle, why is D’alembert's principle not applicable to QM?

    We can derive action principle from dAlemberts principle. Does deviations from classical paths violate the d’alemberts principle? Like the inertial force not balancing external force in a small element of interest? What would this mean in terms of general relativity? So if an inertial force...
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    Graduate My questions about QFT and the standard model

    First of all, I guess classifying particles as excitations of fields stem from the fact that fields can be decomposed into plane waves which are particles in some sense and since they are infinite we have infinitely many of them. Like, any continious electric field can be decomposed into plane...
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    Book recommendation after Sakurai Modern Quantum Physics

    TL;DR Summary: Book after Sakurai Modern Quantum Physics I am doing a comprehensive reading of sakurai and I have solved every problem from chapters I finished on my own, I will finish the book within 2 weeks and I want to delve into qft and other particle physics related topics, not from...
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    Books on artificial photosynthesis

    Thanks for the responses.
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    Books on artificial photosynthesis

    Can anyone recommend books on artificial photosynthesis?
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    Sources to study computational materials science

    Yes I have. Thanks. Since I am still an undergrad, I don't have experience on reading journal but I will give it a try.
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    Sources to study computational materials science

    Can you recommend me a source to self study computational materials science? I am currently doing an internship and want to study in my spare time for materials science. I will take a course named computational methods in materials science but I want to learn it earlier than that but I can't...
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    Undergrad Why Do I Get Electrically Shocked by Metal Objects?

    Whenever I touch to a doorknob or any other metallic object I get electrically shocked. Does this occur because of temperature difference between me and the metal? Is it similar to seebeck effect?
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    Correct statement about transverse wave propagating along a string

    Only 2 is correct. 1)Since P is moving downward the wave is going to right as p approaches to right. 2)Yes, since R has a longer way to go. 3) Both are going to right.
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    Is undergraduate modern physics hard?

    1.Special relativity 2.Quantum theory of light 3.Wave properties of particles 4.Fundementals of quantum physics 5.Solutions of Schrödinger equation for 1 dimensional particles 6.Formalism 7.Angular momentum 8.Solutions of Schrödinger equation for hydrogen atom 9.Solutions of Schrödinger equation...