2018/05/31 by Yasunori Nomura, Grant N. Remmen · 20 citations
Mathematics · Physics and Astronomy · #Advanced Differential Geometry Research #Apparent horizon #Black Holes and Theoretical Physics #Black hole (networking) #Context (archaeology) #Cosmology and Gravitation Theories #Entropy (arrow of time) #Event horizon #Geometry #Holographic principle #Holography #Horizon #Law #Mathematical physics #Mathematics #Optics #Physics #Quantum mechanics #Theoretical physics #Wedge (geometry) #gr-qc #hep-th
paper · pdf · doi:10.1007/jhep08(2018)063
published in Journal of High Energy Physics 2018(8) (Springer Nature) · 41 pages, 8 figures
openalex publication_date 2018/08/01 · arxiv created 2018/08/08 · arxiv updated 2018/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
A bstract We prove a new, large family of area laws in general relativity, which apply to certain classes of untrapped surfaces that we dub generalized holographic screens. Our family of area laws contains, as special cases, the area laws for marginally-trapped surfaces (holographic screens) and the event horizon (Hawking’s area theorem). In addition to these results in general relativity, we show that in the context of holography the geometry of a generalized holographic screen is related to the outer entropy of the screen. Specifically, we show for spherically-symmetric spacetimes that the area of the largest HRT surface consistent with the outer wedge can be computed in terms of the geometry of the general (not necessarily marginally-trapped) codimension-two surface defining the wedge. This outer entropy satisfies a second law of thermodynamics, growing monotonically along the generalized holographic screen. In particular, this result provides the holographic dual for the geometry of the event horizon for spherically-symmetric spacetimes.