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2023 Fiscal Year Annual Research Report

Exploring de Sitter Holography via Quantum Information

Research Project

Project/Area Number 22K20370
Research InstitutionKyoto University

Principal Investigator

Ruan Shanming  京都大学, 基礎物理学研究所, 特定研究員 (90953307)

Project Period (FY) 2022-08-31 – 2024-03-31
Keywordsde Sitter / dS Holography / Holographic Complexity / dS Holography / AdS/CFT Correspondence / Double Holography
Outline of Annual Research Achievements

During this project period, I continued my investigation about holographic complexity and also proposed a new version of de Sitter holography. I have finished six papers as listed in the following:
01. “Complexity Equals Anything II”, DOI: 10.1007/JHEP01(2023)154. We show that there are infinite classes of gravitational observables in asymptotically AdS which can be candidates as a gravitational dual of complexity.
02. “Complexity=Anything: Singularity Probes”, DOI: 10.1007/JHEP07(2023)223. We illustrate how to use our complexity=anything proposal to systematically probe the geometric properties of black hole singularities. 03. “Gluing AdS/CFT”, DOI: 10.1007/JHEP07(2023)080. We investigate gluing together two AdS geometries along a timelike brane, which corresponds to coupling two brane tied theories through gravitational interactions in the dual holographic perspective.
04. “A half de Sitter holography”, DOI: 10.1007/JHEP10(2023)137. In this work, we consider a half dS spacetime wherein a timelike boundary encloses the bulk spacetime, presenting a new version of de Sitter holography.
05. “Double Holography of Entangled Universes”. We employ double holography to examine a system of two entangled gravitating universes that live on two codimension-one branes in an asymptotically AdS3 spacetime with two disjoint conformal boundaries.
06. “Complexity Equals (Almost) Anything”. This paper summarizes the complexity=anything proposal by exploring several simple examples. It contributes to the proceedings volume of Gravity, Strings and Fields.

  • Research Products

    (9 results)

All 2024 2023

All Journal Article (4 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (5 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Complexity equals anything II2023

    • Author(s)
      Belin Alexandre、Myers Robert C.、Ruan Shan-Ming、S?rosi G?bor、Speranza Antony J.
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023 Pages: -

    • DOI

      10.1007/JHEP01(2023)154

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Complexity=anything: singularity probes2023

    • Author(s)
      Jorstad Eivind、Myers Robert C.、Ruan Shan-Ming
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023 Pages: -

    • DOI

      10.1007/JHEP07(2023)223

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A half de Sitter holography2023

    • Author(s)
      Kawamoto Taishi、Ruan Shan-Ming、Suzuki Yu-ki、Takayanagi Tadashi
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023 Pages: -

    • DOI

      10.1007/JHEP10(2023)137

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Gluing AdS/CFT2023

    • Author(s)
      Kawamoto Taishi、Ruan Shan-Ming、Takayanagi Tadashi
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023 Pages: -

    • DOI

      10.1007/JHEP07(2023)080

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Double Holography of Entangled Universes2024

    • Author(s)
      Ruan Shan-Ming
    • Organizer
      The 2nd young researchers' workshop of the Extreme Universe Collaboration
  • [Presentation] A half de Sitter Holography2023

    • Author(s)
      Ruan Shan-Ming
    • Organizer
      ExU-YITP Workshop on Holography, Gravity and Quantum Information
    • Int'l Joint Research
  • [Presentation] Complexity Equals Anything: Singularity Probes2023

    • Author(s)
      Ruan Shan-Ming
    • Organizer
      Asia-Pacific School and Workshop on Gravitation and Cosmology 2023
    • Int'l Joint Research
  • [Presentation] Gluing AdS/CFT2023

    • Author(s)
      Ruan Shan-Ming
    • Organizer
      Black holes, Islands and Braneworlds
    • Int'l Joint Research
  • [Presentation] Complexity Equals Anything: Singularity Probes2023

    • Author(s)
      Ruan Shan-Ming
    • Organizer
      6th International Conference on Holography, String Theory and Spacetimes

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Published: 2024-12-25  

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