Tuesday, March 30, 2021

The Ehrenfest paradox breaks conservation of momentum in special relativity?

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The Ehrenfest paradox concerns the measured circumference of a rigid rotating disk. The circumference appears lengthened in the co-rotating ...
Tuesday, March 23, 2021

Why does QED vertex correction after regularization calculate correctly the classical effect of reduced mass?

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This is continuation to our post on March 18, 2021. First mystery: why a simple photon propagator captures the complex classical Coulomb sca...
Monday, March 22, 2021

How do we know that coupled classical wave equations have solutions that are stable and smooth?

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Short answer: we do not know. Our goal in this blog is to show that divergences in Feynman integrals are an artifact of the approximation me...
Sunday, March 21, 2021

How to solve a classical wave equation with a source? Can we use Klein-Gordon propagators?

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Do the various propagators of the Klein-Gordon equation really produce a Green's function which is zero for times t <= 0, and also ze...
Thursday, March 18, 2021

Why does QED after regularization calculate correctly the vertex correction?

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We believe that the QED vertex correction, or the vertex function, is due to the elastic nature of the classical static electric field of th...

The photograph model: the Feynman path integral is a way to add wave nature to a classical action optimization problem

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Consider a classical system and write a lagrangian for it. https://en.wikipedia.org/wiki/Principle_of_least_action To find the classical beh...
Wednesday, March 17, 2021

Does the rubber plate model of the electron electric field explain bremsstrahlung?

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https://en.wikipedia.org/wiki/Bremsstrahlung Wikipedia seems to claim that bremsstrahlung from a quantum process is much larger than the cla...
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