Related papers: Can we "effectivize'' spacetime?

Can we "effectivize'' spacetime?

URL: http://arxiv.org/abs/2309.04054v1
Date: Fri, 8 Sep 2023 00:59:28 GMT
Title: Can we "effectivize'' spacetime?
Authors: Lu Chen
Abstract summary: According to textiteffective realism, scientific theories give us knowledge about the unobservable world, but not at the fundamental level. This view is justified by the well-received textiteffective-field-theory (EFT) approach to physics. I explain the motivations for the EFT approach and effective realism and their benefits.
Score: 6.793496936204057
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: According to \textit{effective realism}, scientific theories give us knowledge about the unobservable world, but not at the fundamental level. This view is justified by the well-received \textit{effective-field-theory} (EFT) approach to physics, according to which our best physical theories are only applicable up to a certain energy scale and expected to break down beyond that. In this paper, I explain the motivations for the EFT approach and effective realism and their benefits. I also raise new challenges for this approach. Applying effective realism to \textit{effective quantum gravity} (EQG) reveals its shortcomings: EQG does not give us a realistic theory of spacetime even within its scope of validity. It also exposes a general interpretative dilemma faced by all EFTs concerning their indispensable references to classical spacetime beyond their scope of validity.

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