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I got a bunch of requests to comment on a new attempt at a theory of everything that supposedly combines quantum physics with general relativity. I had a look, and this is a quick comment. First reaction, basically. Didn’t get far in the paper, as you will see. I am sorry in case I appear unkind, but this kind of stuff really pisses me off.

The paper is here: https://www.sciencedirect.com/science…

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Continue reading “A New Theory of Everything Just Dropped!” | >

A brief explanation of how superfluid dark matter can combine fluid dark matter and modified gravity.

For galaxy clusters and for the cosmic microwave background, dark matter matter is the better explanation. But to explain galactic rotation curves and other properties of galaxies, modified gravity is the better explanation.

Until now, physicists have taken an either-or approach. In this video I argue that the answer may be a combination of both. This idea may be realized through dark matter which forms a superfluid. In this case dark matter has two phases, a normally fluid phase and a superfluid phase. In the latter phase, it has no internal friction and appears like modified gravity.

Taken together, so I argue, this explains the existing data best.

Continue reading “Superfluid Dark Matter” | >

While it has been suggested that low-energy experiments might allow to find evidence for quantization of gravity, direct detection of single gravitons has normally been considered a hopeless task. Here, the authors suggest that a massive body cooled to the ground state in a gravitational wave background should display detectable stimulated single gravitonions.

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Could something in the future alter the past, so that effect came before cause? Does quantum mechanics truly allow this, as often hinted?

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Credits:
Retrocausality: Cause After Effect.
Episode 461a; August 25, 2024
Produced, Written \& Narrated by: Isaac Arthur.
Select imagery/video supplied by Getty Images.
Music Courtesy of Epidemic Sound http://epidemicsound.com/creator

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