SciPost Submission Page
Constraining braneworlds with entanglement entropy
by Hao Geng, Andreas Karch, Carlos Perez-Pardavila, Lisa Randall, Marcos Riojas, Sanjit Shashi, Merna Youssef
This Submission thread is now published as
Submission summary
| Authors (as registered SciPost users): | Hao Geng · Sanjit Shashi |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202307_00012v2 (pdf) |
| Date accepted: | 2023-10-24 |
| Date submitted: | 2023-09-26 03:14 |
| Submitted by: | Shashi, Sanjit |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
|
| Approach: | Theoretical |
Abstract
We propose swampland criteria for braneworlds viewed as effective field theories of defects coupled to semiclassical gravity. We do this by exploiting their holographic interpretation. We focus on general features of entanglement entropies and their holographic calculations. Entropies have to be positive. Furthermore, causality imposes certain constraints on the surfaces that are used holographically to compute them, most notably a property known as causal wedge inclusion. As a test case, we explicitly constrain the Dvali--Gabadadze--Porrati term as a second-order-in-derivatives correction to the Randall--Sundrum action. We conclude by discussing the implications of these criteria for the question on whether entanglement islands in theories with massless gravitons are possible in Karch--Randall braneworlds.
Author comments upon resubmission
List of changes
- Corrected typos
- Sharpened the language around the presentation of results
- Fixed the argument for entropy positivity
- Added discussion/speculation on other higher-derivative terms
- Clarified some of the highlighted vague points
Published as SciPost Phys. 15, 199 (2023)