Entanglement Island versus Massless Gravity
arXiv:2212.07645 · doi:10.1140/epjc/s10052-024-12485-3
Abstract
Entanglement islands play an essential role in the recent breakthrough in addressing the black hole information paradox. Inspired by double holography, it is conjectured that the entanglement islands can exist only in massive gravity. There are many pieces of evidence but also debates for this conjecture. This paper recovers the massless entanglement island in wedge holography with negative DGP gravity on the brane. However, the spectrum of negative DGP gravity includes a massive ghost, implying the model is unstable. Our work supports the view that there is no entanglement island in a well-defined braneworld model of massless gravity if one divides the radiation and black hole regions by minimizing entanglement entropy. However, such a partition results in a zero radiation region containing no information. Whether there are other physical non-trivial partitions of the radiation region is an open question and deserves further study.
6 pages, 3 figures, revision published in EPJC
References in corpus (9)
- Resummation of Massive Gravity
- Complexity and Shock Wave Geometries
- Inconsistency of Islands in Theories with Long-Range Gravity
- Acausality of Massive Gravity
- Dirichlet Baths and the Not-so-Fine-Grained Page Curve
- Entanglement Island and Page Curve in Wedge Holography
- Massless Entanglement Islands in Cone Holography
- Conformal Boundary Condition and Massive Gravitons in AdS/BCFT
- Effective Action, Spectrum and First Law of Wedge Holography