Can You Buy a Black Hole for 20 Euros? Understanding Maldacena's Second Slide

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Discussion Overview

The discussion revolves around the interpretation of Juan Maldacena's second slide from his talk at the Marcel Grossman Meeting, specifically focusing on the symbolism of a 20 euro note and its connection to the concept of a bridge, which is central to Maldacena's conjectured equivalence between two mathematical theories.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant notes that the 20 euro note features a graphic emblem of a bridge, suggesting that this imagery relates to the theme of Maldacena's talk.
  • Another participant elaborates that the bridge symbolizes the conjectured equivalence between two types of mathematical theories: one concerning a universe with a negative cosmological constant and the other a field theory on a boundary with one less dimension.
  • A later reply adds a poetic observation about the bridge's reflection, implying a deeper conceptual connection but not expanding on its significance.

Areas of Agreement / Disagreement

The discussion does not present any explicit consensus or disagreement, as participants are primarily exploring interpretations and connections without contesting each other's views.

Contextual Notes

The discussion may be limited by assumptions regarding the audience's familiarity with Maldacena's theories and the specific implications of the bridge metaphor, which remain unresolved.

Who May Find This Useful

Readers interested in theoretical physics, particularly those exploring concepts related to quantum gravity and mathematical physics, may find this discussion relevant.

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atyy said:
Juan Maldacena gave a talk at this year's Marcel Grossman Meeting:
http://www.icra.it/MG/mg12/en/..\talks_plenary\Maldacena.pdf

What is the meaning of Maldacena's second slide?

I took a look and it occurred to me that the 20 euro note displays the graphic emblem of a bridge, and the bridge idea is the theme of Maldacena's talk.

In his case the bridge he wants to discuss is the conjectured equivalence between two kinds of mathematical theory. One on bulk (for a universe which apparently unlike ours has negative cosmo constant) and the other on boundary--a field theory on a screen of one less dimension.
 
Last edited:
And the bridge emerges from its reflection. (Saying "the bridge reflects in water" is not so exciting.)
 
Cool, thanks!
 

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