Metaphysical Thoughts - Making Quantum Mechanics Logical
August 31, 2026: QED and vacuum polarization – The physics blog of Heikki Tuuri.
Thursday, November 27, 2025
Electron propagator controls bremsstrahlung in the Feynman diagram: how does it know how to do it?
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In the November 10, 2025 post we realized that the electron propagator governs the form of the bremsstrahlung wave in the Feynman diagram. ...
Tuesday, November 25, 2025
Feynman diagrams miscalculate the box diagram and bremsstrahlung in the classical limit
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In our blog post on November 10, 2025 we showed that Feynman integrals miscalculate several simple processes in the classical limit. ...
Monday, November 10, 2025
Quantum gravity: vertex correction, propagator, coupling
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In QED, the vertex correction may be due to almost-bremsstrahlung which cannot escape as a real photon. https://arxiv.org/abs/hep-th/0211072...
Tuesday, November 4, 2025
Intuitive vacuum polarization model in QED – no vacuum polarization in gravity?
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Let us, finally, try to construct an intuitive vacuum polarization model in QED, such that the model is not just hand waving. ...
Friday, October 24, 2025
Gravity: a "limp" rubber membrane is a model – vacuum polarization
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Now that we understand QED better, let us return to the problem of ultraviolet diverging loop integrals in quantum gravity. What kind of a m...
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