Ginestra Bianconi

speaker

345 appearances 1 recordings 1 series first heard Jul 2026 last heard 13 Jul

Ginestra Bianconi’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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Theories of Everything with Curt Jaimungal · Ginestra Bianconi: The Physicist Who (Unexpectedly) Derived Gravity From Entropy · 13 Jul 2026 podcast

There, of course, dark energy, somehow dark matter.

So cosmologists are now becoming very welcoming for this theory.

And yes, I had a very nice conversation.

Of course, you know, I'm not in the stream of thoughts that start with the holographic screen.

So there is also some...

some clash there of our understanding.

Of course, I think that, you know, the area law is fundamental, but I think is a macroscopic field.

So, and what I want to say is that actually gravity from entropy to some extent reproduce the area law from the microscopic degree of freedom.

So this is, so practically the Lagrangian is defined over volume.

So if you integrate over a black hole area,

you know, until the Spur-Shield radius, you find a dimensionality reduction.

And this is essential because practically holography has been, you know, a kind of explanation of the area law coming after Bekenstein.

Bekenstein didn't use the holography.

And it's a very simple conceptual idea is that just if you have the entropy, which is the logarithm of the number of degree of freedom, typically the entropy scales like the volume.

So in order to have it in such a way that it scales with the area, the degree of freedom must be only on the surface, on the horizon.

But actually this assumption...

builds on the idea that, you know, the degree of freedom are the same in every point, you know, inside the black hole.

And in gravity from entropy, because gravity from entropy doesn't depend only on the Ricci tensor or Ricci's color, but depends also on the Riemann tension and so on, on the wave curvature.

Mm-hmm.

So what happens is that the degree of freedom in a black hole, right, the degree of freedom inside are not always the same, depends on the distance from the origin.

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