Strengthening the de Sitter swampland conjecture in warm inflation

Robert Brandenberger (Department of Physics, McGill University, Montreal, QC, H3A 2T8, Canada) ; Vahid Kamali (Department of Physics, McGill University, Montreal, QC, H3A 2T8, Canada; Department of Physics, Bu-Ali Sina (Avicenna) University, Hamedan, 65178 016016, Iran; School of Physics, Institute for Research in Fundamental Sciences (IPM), Tehran, 19538-33511, Iran) ; Rudnei Ramos (Departamento de Fisica Teorica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, 20550-013, Brazil)

The de Sitter constraint on the space of effective scalar field theories consistent with superstring theory provides a lower bound on the slope of the potential of a scalar field which dominates the evolution of the Universe, e.g., a hypothetical inflaton field. Whereas models of single scalar field inflation with a canonically normalized field do not obey this constraint, it has been claimed recently in the literature that models of warm inflation can be made compatible with it in the case of large dissipation. The de Sitter constraint is known to be derived from entropy considerations. Since warm inflation necessary involves entropy production, it becomes necessary to determine how this entropy production will affect the constraints imposed by the swampland conditions. Here, we generalize these entropy considerations to the case of warm inflation and show that the condition on the slope of the potential remains essentially unchanged and is, hence, robust even in the warm inflation dynamics. We are then able to conclude that models of warm inflation indeed can be made consistent with the swampland criteria.

{
  "_oai": {
    "updated": "2020-11-24T01:52:00Z", 
    "id": "oai:repo.scoap3.org:56552", 
    "sets": [
      "JHEP"
    ]
  }, 
  "authors": [
    {
      "affiliations": [
        {
          "country": "Canada", 
          "value": "Department of Physics, McGill University, Montreal, QC, H3A 2T8, Canada", 
          "organization": "McGill University"
        }
      ], 
      "surname": "Brandenberger", 
      "email": "rhb@hep.physics.mcgill.ca", 
      "full_name": "Brandenberger, Robert", 
      "given_names": "Robert"
    }, 
    {
      "affiliations": [
        {
          "country": "Canada", 
          "value": "Department of Physics, McGill University, Montreal, QC, H3A 2T8, Canada", 
          "organization": "McGill University"
        }, 
        {
          "country": "Iran", 
          "value": "Department of Physics, Bu-Ali Sina (Avicenna) University, Hamedan, 65178 016016, Iran", 
          "organization": "Bu-Ali Sina (Avicenna) University"
        }, 
        {
          "country": "Iran", 
          "value": "School of Physics, Institute for Research in Fundamental Sciences (IPM), Tehran, 19538-33511, Iran", 
          "organization": "School of Physics, Institute for Research in Fundamental Sciences (IPM)"
        }
      ], 
      "surname": "Kamali", 
      "email": "vkamali@basu.ac.ir", 
      "full_name": "Kamali, Vahid", 
      "given_names": "Vahid"
    }, 
    {
      "affiliations": [
        {
          "country": "Brazil", 
          "value": "Departamento de Fisica Teorica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ, 20550-013, Brazil", 
          "organization": "Departamento de Fisica Teorica, Universidade do Estado do Rio de Janeiro"
        }
      ], 
      "surname": "Ramos", 
      "email": "rudnei@uerj.br", 
      "full_name": "Ramos, Rudnei", 
      "given_names": "Rudnei"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "Strengthening the de Sitter swampland conjecture in warm inflation"
    }
  ], 
  "dois": [
    {
      "value": "10.1007/JHEP08(2020)127"
    }
  ], 
  "publication_info": [
    {
      "page_end": "13", 
      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2020", 
      "artid": "JHEP08(2020)127", 
      "year": 2020, 
      "page_start": "1", 
      "journal_issue": "8"
    }
  ], 
  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "acquisition_source": {
    "date": "2020-11-24T01:32:12.775080", 
    "source": "Springer", 
    "method": "Springer", 
    "submission_number": "2fca3b462dec11ebbd0e02163e01809a"
  }, 
  "page_nr": [
    13
  ], 
  "license": [
    {
      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2020"
    }
  ], 
  "control_number": "56552", 
  "record_creation_date": "2020-08-26T20:30:32.713669", 
  "_files": [
    {
      "checksum": "md5:851d3efc26e3ba24484b32670bfd582d", 
      "filetype": "xml", 
      "bucket": "6ac3bb87-f689-4b21-836a-87514bb57e14", 
      "version_id": "87c65159-9100-4fe9-94c6-5f26fe7e53d3", 
      "key": "10.1007/JHEP08(2020)127.xml", 
      "size": 12516
    }, 
    {
      "checksum": "md5:6f78be02385e357e488cfe08cf830130", 
      "filetype": "pdf/a", 
      "bucket": "6ac3bb87-f689-4b21-836a-87514bb57e14", 
      "version_id": "5efa2b6d-ae71-463c-8660-fa3956b35767", 
      "key": "10.1007/JHEP08(2020)127_a.pdf", 
      "size": 299411
    }
  ], 
  "collections": [
    {
      "primary": "Journal of High Energy Physics"
    }
  ], 
  "arxiv_eprints": [
    {
      "categories": [
        "hep-th", 
        "astro-ph.CO", 
        "gr-qc", 
        "hep-ph"
      ], 
      "value": "2002.04925"
    }
  ], 
  "abstracts": [
    {
      "source": "Springer", 
      "value": "The de Sitter constraint on the space of effective scalar field theories consistent with superstring theory provides a lower bound on the slope of the potential of a scalar field which dominates the evolution of the Universe, e.g., a hypothetical inflaton field. Whereas models of single scalar field inflation with a canonically normalized field do not obey this constraint, it has been claimed recently in the literature that models of warm inflation can be made compatible with it in the case of large dissipation. The de Sitter constraint is known to be derived from entropy considerations. Since warm inflation necessary involves entropy production, it becomes necessary to determine how this entropy production will affect the constraints imposed by the swampland conditions. Here, we generalize these entropy considerations to the case of warm inflation and show that the condition on the slope of the potential remains essentially unchanged and is, hence, robust even in the warm inflation dynamics. We are then able to conclude that models of warm inflation indeed can be made consistent with the swampland criteria."
    }
  ], 
  "imprints": [
    {
      "date": "2020-08-25", 
      "publisher": "Springer"
    }
  ]
}
Published on:
25 August 2020
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2020 (2020)
Issue 8
Pages 1-13
DOI:
https://doi.org/10.1007/JHEP08(2020)127
arXiv:
2002.04925
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: