Asymptotically free mimetic gravity

Ali Chamseddine (Physics Department, American University of Beirut, Beirut, Lebanon; Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen, 6525 AJ, The Netherlands) ; Viatcheslav Mukhanov (Theoretical Physics, Ludwig Maxmillians University, Theresienstr. 37, Munich, 80333, Germany; MPI for Physics, Foehringer Ring, 6, Munich, 80850, Germany; School of Physics, Korea Institute for Advanced Study, Seoul, 02455, Korea) ; Tobias Russ (Theoretical Physics, Ludwig Maxmillians University, Theresienstr. 37, Munich, 80333, Germany)

The idea of “asymptotically free” gravity is implemented using a constrained mimetic scalar field. The effective gravitational constant is assumed to vanish at some limiting curvature. As a result singularities in spatially flat Friedmann and Kasner universes are avoided. Instead, the solutions in both cases approach a de Sitter metric with limiting curvature. We show that quantum metric fluctuations vanish when this limiting curvature is approached.

{
  "_oai": {
    "updated": "2019-08-27T03:36:58Z", 
    "id": "oai:repo.scoap3.org:48340", 
    "sets": [
      "EPJC"
    ]
  }, 
  "authors": [
    {
      "affiliations": [
        {
          "country": "Lebanon", 
          "value": "Physics Department, American University of Beirut, Beirut, Lebanon", 
          "organization": "American University of Beirut"
        }, 
        {
          "country": "Netherlands", 
          "value": "Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, Heyendaalseweg 135, Nijmegen, 6525 AJ, The Netherlands", 
          "organization": "Radboud University Nijmegen"
        }
      ], 
      "surname": "Chamseddine", 
      "given_names": "Ali", 
      "full_name": "Chamseddine, Ali"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Theoretical Physics, Ludwig Maxmillians University, Theresienstr. 37, Munich, 80333, Germany", 
          "organization": "Ludwig Maxmillians University"
        }, 
        {
          "country": "Germany", 
          "value": "MPI for Physics, Foehringer Ring, 6, Munich, 80850, Germany", 
          "organization": "MPI for Physics"
        }, 
        {
          "country": "South Korea", 
          "value": "School of Physics, Korea Institute for Advanced Study, Seoul, 02455, Korea", 
          "organization": "Korea Institute for Advanced Study"
        }
      ], 
      "surname": "Mukhanov", 
      "email": "Viatcheslav.Mukhanov@physik.uni-muenchen.de", 
      "full_name": "Mukhanov, Viatcheslav", 
      "given_names": "Viatcheslav"
    }, 
    {
      "affiliations": [
        {
          "country": "Germany", 
          "value": "Theoretical Physics, Ludwig Maxmillians University, Theresienstr. 37, Munich, 80333, Germany", 
          "organization": "Ludwig Maxmillians University"
        }
      ], 
      "surname": "Russ", 
      "given_names": "Tobias", 
      "full_name": "Russ, Tobias"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "Asymptotically free mimetic gravity"
    }
  ], 
  "dois": [
    {
      "value": "10.1140/epjc/s10052-019-7075-y"
    }
  ], 
  "publication_info": [
    {
      "page_end": "6", 
      "journal_title": "European Physical Journal C", 
      "material": "article", 
      "journal_volume": "79", 
      "artid": "s10052-019-7075-y", 
      "year": 2019, 
      "page_start": "1", 
      "journal_issue": "7"
    }
  ], 
  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "acquisition_source": {
    "date": "2019-08-27T05:34:03.117873", 
    "source": "Springer", 
    "method": "Springer", 
    "submission_number": "f317b6b0c87a11e9be7702163e01809a"
  }, 
  "page_nr": [
    6
  ], 
  "license": [
    {
      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2019"
    }
  ], 
  "control_number": "48340", 
  "record_creation_date": "2019-07-03T11:30:18.270952", 
  "_files": [
    {
      "checksum": "md5:b921e57ec8aaa5e81ad9f04221080703", 
      "filetype": "xml", 
      "bucket": "9bf1c398-2de2-46bf-817e-f50e00af9ded", 
      "version_id": "f3446de8-e583-4398-8cbe-5d58f1c88688", 
      "key": "10.1140/epjc/s10052-019-7075-y.xml", 
      "size": 11391
    }, 
    {
      "checksum": "md5:65ee901cca1b959c2236cc289a40a7f2", 
      "filetype": "pdf/a", 
      "bucket": "9bf1c398-2de2-46bf-817e-f50e00af9ded", 
      "version_id": "c01482a5-d47a-49ec-9dc5-826b2a524271", 
      "key": "10.1140/epjc/s10052-019-7075-y_a.pdf", 
      "size": 281601
    }
  ], 
  "collections": [
    {
      "primary": "European Physical Journal C"
    }
  ], 
  "arxiv_eprints": [
    {
      "categories": [
        "hep-th", 
        "gr-qc"
      ], 
      "value": "1905.01343"
    }
  ], 
  "abstracts": [
    {
      "source": "Springer", 
      "value": "The idea of \u201casymptotically free\u201d gravity is implemented using a constrained mimetic scalar field. The effective gravitational constant is assumed to vanish at some limiting curvature. As a result singularities in spatially flat Friedmann and Kasner universes are avoided. Instead, the solutions in both cases approach a de Sitter metric with limiting curvature. We show that quantum metric fluctuations vanish when this limiting curvature is approached."
    }
  ], 
  "imprints": [
    {
      "date": "2019-08-26", 
      "publisher": "Springer"
    }
  ]
}
Published on:
26 August 2019
Publisher:
Springer
Published in:
European Physical Journal C , Volume 79 (2019)
Issue 7
Pages 1-6
DOI:
https://doi.org/10.1140/epjc/s10052-019-7075-y
arXiv:
1905.01343
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: