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2023 Fiscal Year Annual Research Report

Hunting physics beyond General Relativity with gravitational waves

Research Project

Project/Area Number 22KF0178
Allocation TypeMulti-year Fund
Research InstitutionKyoto University

Principal Investigator

向山 信治  京都大学, 基礎物理学研究所, 教授 (40396809)

Co-Investigator(Kenkyū-buntansha) DI FILIPPO FRANCESCO  京都大学, 基礎物理学研究所, 外国人特別研究員
Project Period (FY) 2023-03-08 – 2024-03-31
Keywordsgravitation / cosmology / gravitational waves
Outline of Annual Research Achievements

The research focused on aspects related to theory and phenomenology and non-singular black holes and the information loss paradox.
Regarding non-singular black holes, Dr. Di Filippo have obtained a constrain regarding the possible presence of a surface for ultracompact objects mimicking supermassive black holes based on the absence of an outgoing thermal flux of radiation. He has also established a connection between regular black holes and ultracompact stars. Finally, he has discussed some aspect concerning the stability of regular black holes.
Regarding the information paradox, the research focused on the introduction of a new techniques to study the quantum states of Hawking radiation. This should be regarded as a first step toward understanding the connection between soft hair and the information paradox.
Finally, Dr. Di Filippo contributed to a book on regular black holes by co-writing a chapter.

  • Research Products

    (5 results)

All 2023

All Journal Article (5 results)

  • [Journal Article] Constraints on thermalizing surfaces from infrared observations of supermassive black holes2023

    • Author(s)
      Carballo-Rubio Ra?l、Filippo Francesco Di、Liberati Stefano、Visser Matt
    • Journal Title

      Journal of Cosmology and Astroparticle Physics

      Volume: 2023 Pages: 041~041

    • DOI

      10.1088/1475-7516/2023/11/041

  • [Journal Article] Soft hair, dressed coordinates, and information loss paradox2023

    • Author(s)
      Di Filippo Francesco、Ogawa Naoki、Mukohyama Shinji、Waki Takahiro
    • Journal Title

      Physical Review D

      Volume: 108

    • DOI

      10.1103/PhysRevD.108.044034

  • [Journal Article] Comment on “Regular evaporating black holes with stable cores”2023

    • Author(s)
      Carballo-Rubio Ra?l、Di Filippo Francesco、Liberati Stefano、Pacilio Costantino、Visser Matt
    • Journal Title

      Physical Review D

      Volume: 108

    • DOI

      10.1103/PhysRevD.108.128501

  • [Journal Article] A connection between regular black holes and horizonless ultracompact stars2023

    • Author(s)
      Carballo-Rubio Ra?l、Di Filippo Francesco、Liberati Stefano、Visser Matt
    • Journal Title

      Journal of High Energy Physics

      Volume: 2023

    • DOI

      10.1007/JHEP08(2023)046

  • [Journal Article] Singularity-Free Gravitational Collapse: From Regular Black Holes to Horizonless Objects2023

    • Author(s)
      Carballo-Rubio Ra?l、Di Filippo Francesco、Liberati Stefano、Visser Matt
    • Journal Title

      Regular Black Holes

      Pages: 353~387

    • DOI

      10.1007/978-981-99-1596-5_9

URL: 

Published: 2024-12-25  

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