Ginestra Bianconi

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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

So when you express this relative entropy, you know, conceptually the idea is that you have these two different entropy, but the idea is that this entropy also quantifies the numbers of microscopic degree of freedom of this interplane between matter and geometry.

So you have at the same time

you know, an understanding in terms of a relative entropy and an understanding as the Boltzmann-like entropy.

And I have a paper that is now in press in PRD, which show that actually if you consider this action and you calculate this action over Friedmann universe, which are an approximation of the solution of the modified gravity equation, you find that actually this Lagrangian equation

decrease in time so that you know you have these two metrics kind of trying to be close to each other but actually they are integral so the action which integrates over the measure and can be interpreted as a entropy increase in time so the universe is consistent with an action that describes the total entropy that increase in time while the relative entropy locally

decrease in time.

So that's an interesting aspect in terms of statistical physics.

So, no, there is no assumption of any Minkowski background.

Absolutely not.

So the true metric is the true metric, the one that defines the richest color, the Riemann curvature.

So it is the true metric as it is.

And the metric induced by the matter field and curvature, it's a geometrization of the matter field.

And this builds...

on a different insight.

The first insight is Gauss, the first fundamental form of Gauss, which express practically, you know, in the simplest setting, you can say, you know, you have your manifold, which might be curve or whatever,

your general Lorentzian manifold.

And then you have, let's say, a scalar field which defines an additional dimension.

And then this scalar field, you can imagine as a surface defined on your original manifold because it's, you know, your scalar field defined on the manifold.

Now for this surface, there is a notion of metric induced by this function.

And this is described by the first fundamental form of Gauss.

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