Skip to content
DraconiticResearch
Search Sources API
190,851 studies31 sourcesUpdated 10 min ago
PreprintarXiv licencearXiv

Natural Inflation with a negative cosmological constant

  • Chia-Min Lin
  • Naoto Maki
  • Kazunori Kohri
Open at sourcePDFDOICite

Abstract

In this work, we investigate a cosmic inflation model based on a cosine-type potential with a negative cosmological constant. This model originates from a classical solution of the Wheeler-DeWitt equation. The equation of motion for the inflaton field can be solved analytically without relying on approximation schemes, such as the slow-roll conditions. The predictions of the spectral index, the tensor-to-scalar ratio, and the running spectral index are calculated and compared with experimental constraints from Planck Collaboration, Atacama Cosmology Telescope Collaboration (ACT), and Dark Energy Spectroscopic Instrument (DESI).

Related

  1. Quasicrystalline Inflation: From the Cosmological Dipole to Primordial Diffraction
    Jiro Soda
    arXivPreprintarXiv licenceFull textCosmologyGravitation & general relativityarXiv
  2. General Spin-1 Dynamics During Inflation: Microcausality Constraints and Cosmological Collider Signals
    Trevor Cheung, Carlos Duaso-Pueyo, David Stefanyszyn +1
    arXivPreprintCC BY 4.0Full textCosmologyGravitation & general relativityarXiv
  3. Cosmological constraints on single-field inflation models from ACT/SPT data and observations at sub-Mpc scales
    Qing-Yang Wang, Jing-Zhi Zhou, Fei-Yu Chen +1
    arXivPreprintarXiv licenceFull textCosmologyGravitation & general relativityarXiv
  4. Constant-Roll Inflation as a Competitive Alternative to Slow-Roll Inflation
    Sandip Biswas, Rajib Saha, Kaushik Bhattacharya
    arXivPreprintCC BY 4.0Full textCosmologyGravitation & general relativityarXiv
  5. The alternative scalar field dark sector of the Universe: Cosmological inflation, quintessence and ekpyrotic model in the framework of scalar-tensor cosmology
    Marcin Postolak
    arXivPreprintarXiv licenceFull textCosmologyGravitation & general relativityarXiv

Cite

BibTeXRIS
BibTeX
@misc{lin2026natural,
  title = {{Natural Inflation with a negative cosmological constant}},
  author = {Chia-Min Lin and Naoto Maki and Kazunori Kohri},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2606.10485},
  eprint = {2606.10485},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.10485},
}
RIS
TY  - UNPB
TI  - Natural Inflation with a negative cosmological constant
AU  - Chia-Min Lin
AU  - Naoto Maki
AU  - Kazunori Kohri
PY  - 2026
DA  - 2026/09/07
PB  - arXiv
DO  - 10.48550/arxiv.2606.10485
UR  - https://arxiv.org/abs/2606.10485
AB  - In this work, we investigate a cosmic inflation model based on a cosine-type potential with a negative cosmological constant. This model originates from a classical solution of the Wheeler-DeWitt equation. The equation of motion for the inflaton field can be solved analytically without relying on approximation schemes, such as the slow-roll conditions. The predictions of the spectral index, the tensor-to-scalar ratio, and the running spectral index are calculated and compared with experimental constraints from Planck Collaboration, Atacama Cosmology Telescope Collaboration (ACT), and Dark Energy Spectroscopic Instrument (DESI).
ER  -