Saturday, August 24, 2019

The gauge symmetry of electromagnetism plus charges does not hold in a relativistic setting

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Much of modern physics rests on the assumption that electromagnetism has a gauge symmetry, and that the electromagnetic field is a gauge fie...
Tuesday, August 20, 2019

The Navier-Stokes millennium problem and the existence of solutions for the Einstein equations

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In this blog we have brought up the question whether the Einstein field equations have a solution for any  realistic physical system. The ...
Wednesday, August 14, 2019

How was the fractal-like anisotropy of the cosmic microwave background born?

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http://www.astro.ucla.edu/~wright/CMB-DT.html https://www.physicsoverflow.org/19466/why-is-the-cmb-nearly-scale-invariant The difference...
Monday, August 12, 2019

How does a scalar field behave in an expanding spatial metric?

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The inflation hypothesis assumes the existence of a scalar field whose scalar value throughout the space "rolls" to a lower energy...
Saturday, August 10, 2019

Problems with the cosmological inflation hypothesis

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In the past week we have been studying the FLRW model and the inflation hypothesis. https://en.wikipedia.org/wiki/Friedmann–Lemaître–Rober...
Monday, July 29, 2019

Stephen R. Green and Robert M. Wald did not prove "no backreaction" in the FLRW universe

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A Simple, Heuristic Derivation of our "No Backreaction" Results Stephen R. Green, Robert M. Wald (Submitted on 25 Jan 2016) ...
Saturday, July 27, 2019

How to embed two stars in the Minkowski space?

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If we have just one spherically symmetric star in an asymptotic Minkowski space, then the Schwarzschild exterior metric is an exact solution...