Is the Randall-Sundrum model background independent?

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Discussion Overview

The discussion centers around the background independence of the Randall-Sundrum model, its relationship to string theory, and the potential for constructing models that can represent various theories or mathematical structures. Participants explore theoretical implications and the nature of these models within the context of string theory and other frameworks.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants note that while the Randall-Sundrum models are inspired by string theory, they are logically independent and background dependent, even if the underlying theory may be background independent.
  • Questions arise about how to formulate a background independent version of string theory through AdS/CFT, given that AdS is defined on a specific background.
  • There is curiosity about the possibility of constructing Randall-Sundrum models that are fundamentally based on string theory.
  • Participants inquire whether Randall-Sundrum models can be designed to represent any type of theory or mathematical structure, referencing concepts like Tegmark's Mathematical Universe Hypothesis.
  • Clarifications are sought regarding the terms "completely" and "any" in the context of building models based on string theory and their representational capabilities.

Areas of Agreement / Disagreement

Participants express differing views on the background independence of Randall-Sundrum models and their relationship to string theory. There is no consensus on whether such models can be constructed to represent all mathematical structures or theories.

Contextual Notes

Participants highlight the complexity of defining background independence and the implications of various Randall-Sundrum models, suggesting that assumptions about their independence from string theory may vary.

Suekdccia
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TL;DR
Is Randall-Sundrum model background independent?
Randall-Sundrum model (https://en.wikipedia.org/wiki/Randall–Sundrum_model) is related to string theory.

String theory can be background independent (https://en.wikipedia.org/wiki/Background_independence):

"String theory is usually formulated with perturbation theory around a fixed background. While it is possible that the theory defined this way is locally background-invariant, if so, it is not manifest, and it is not clear what the exact meaning is. One attempt to formulate string theory in a manifestly background-independent fashion is string field theory, but little progress has been made in understanding it.
Another approach is the conjectured, but yet unproven AdS/CFT duality
"

Since some "types" of Randall-Sundrum models have been useful to understand AdS/CFT, can they be background independent as well?

Also, are there any "types" of Randall-Sundrum models that are completely independent from string theory? That could possibly be right even if string theory is wrong?

And finally, can we build Randall-Sundrum models that can represent any type of theory/mathematical structure (similar to what happens with holographic principle)?
 
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RS models are inspired by string theory but are logically independent on it. As models they are background dependent, even if the underlying more fundamental theory (string theory or whatever) is background independent.
 
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How would one formulate a background independent formulation of string theory via AdS/CFT? I mean, it already contains the word "AdS": It's formulated on a certain background.
 
Demystifier said:
RS models are inspired by string theory but are logically independent on it. As models they are background dependent, even if the underlying more fundamental theory (string theory or whatever) is background independent.

Thank you for your answer

And in that case, could we have Randall-Sundrum models completely based on string theory? 8I suspect the case is yes, but I would need confirmation)

Also, can we build Randall-Sundrum models that can represent any type of theory/mathematical structure?
 
Suekdccia said:
And in that case, could we have Randall-Sundrum models completely based on string theory?
What do you mean by "completely"?

Suekdccia said:
Also, can we build Randall-Sundrum models that can represent any type of theory/mathematical structure?
What do you mean by "any"?
 
Demystifier said:
What do you mean by "completely"?

What do you mean by "any"?

1. I heard that there are various Randall-Sundrum models. I was wondering if we could build a model like this but solely based on string theory. A Randall-Sundrum model fundamentally based in strings and string theory?

2. Are you familiar with Tegmark's Mathematical Universe Hypothesis? (https://en.wikipedia.org/wiki/Mathematical_universe_hypothesis). It proposes that every single mathematical structure and model in physics exists physically

I was wondering whether we could build Randall-Sundrum models that could represent any theory and model in mathematics and physics (a model based on string theory, another in inflation, another standard cosmology, another containing "n" dimensions...etc)
 

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