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Similar

F. F. Gautason, L. Schneiderbauer, W. Sybesma and L. Thorlacius, “Page Curve for an Evaporating Black Hole,” [arXiv:2004.00598 [hep-th]]
Original
2004
Cited alongside, same era.
T. Anegawa and N. Iizuka, “Notes on islands in asymptotically flat 2d dilaton black holes,” [arXiv:2004.01601 [hep-th]]
Original
2004
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K. Hashimoto, N. Iizuka and Y. Matsuo, “Islands in Schwarzschild black holes,” [arXiv:2004.05863 [hep-th]]
Original
2004
Cited alongside, same era.
T. Hartman, E. Shaghoulian and A. Strominger, “Islands in Asymptotically Flat 2D Gravity,” [arXiv:2004.13857 [hep-th]]
Original
2004
Cited alongside, same era.
A. Hamilton, D. N. Kabat, G. Lifschytz and D. A. Lowe, “Holographic representation of local bulk operators,” Phys. Rev. D 74

Then

A. C. Wall, “Maximin Surfaces, and the Strong Subadditivity of the Covariant Holographic Entanglement Entropy,” Class. Quant. Grav. 31
Original
2014
Later among the works it cites.
N. Engelhardt and A. C. Wall, “Extremal Surface Barriers,” JHEP 03
Original
2014
Later among the works it cites.
A. Almheiri, X. Dong and D. Harlow, “Bulk Locality and Quantum Error Correction in AdS/CFT,” JHEP 1504
Original
2015
Later among the works it cites.
N. Engelhardt and A. C. Wall, “Quantum Extremal Surfaces: Holographic Entanglement Entropy beyond the Classical Regime,” JHEP 1501
Original
2015
Later among the works it cites.
B. Czech, L. Lamprou, S. McCandlish and J. Sully, “Integral Geometry and Holography,” JHEP 1510

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2020

Page Curve and the Information Paradox in Flat Space

Krishnan, Chethan, Patil, Vaishnavi, Pereira, Jude

Understand

Asymptotic Causal Diamonds (ACDs) are a natural flat space analogue of AdS causal wedges, and it has been argued previously that they may be useful for understanding bulk locality in flat space holography.

In this paper, we use ACD-inspired ideas to argue that there exist natural candidates for Quantum Extremal Surfaces (QES) and entanglement wedges in flat space, anchored to the conformal boundary.
When there is a holographic screen at finite radius, we can also associate entanglement wedges and entropies to screen sub-regions, with the system naturally coupled to a sink.
The screen and the boundary provide two complementary ways of formulating the information paradox.