Skip to content
DraconiticResearch
Search Sources API
186,125 studies31 sourcesUpdated 58 min ago
PreprintarXiv licencearXiv

An obstruction to cosmic acceleration from shift-symmetric dark sector interactions

  • Jose Beltrán Jiménez
  • Luis J. Garay
  • Erik Jensko
  • María Pérez Garrote
Open at sourcePDFDOICite

Abstract

Using the effective field theory of cosmological media, we show that derivative interactions in the dark sector between a perfect fluid and a superfluid cannot support slow-roll expansion while remaining free from instabilities. Furthermore, decomposing the dark sector medium into effective dark matter and dark energy components, we find that the stability conditions exclude a phantom-to-non-phantom crossing. Our approach gives a clear route for constructing theoretically viable dark sector models, and highlights the fundamental constraints that stability requirements impose on their cosmological dynamics.

Related

  1. Model-independent and reconstruction-free evidence for cosmic acceleration from DESI baryon acoustic oscillations
    Laura Herold, Graeme E. Addison, Adam G. Riess
    arXivPreprintCC BY 4.0Full textCosmologyarXiv
  2. Exploring Cosmic Rays from Gravity-Limited Acceleration at Supermassive Black Holes
    Elena Manao, Elisa Resconi, Frank M. Rieger +2
    arXivPreprintCC BY 4.0Full textGalaxiesHigh-energy astrophysicsarXiv
  3. SN 1006: A Cosmic Laboratory for Investigating Shock Acceleration Physics
    Emma McGinness, Rebecca Diesing, Damiano Caprioli +1
    arXivPreprintCC BY 4.0Full textHigh-energy astrophysicsarXiv
  4. Constraining Cosmic-Ray Acceleration and Escape in Middle-Aged Supernova Remnants with GeV-TeV Gamma-Ray Observations
    Siyu Chen, Bing Theodore Zhang, Yi Xing +2
    arXivPreprintCC BY 4.0Full textHigh-energy astrophysicsarXiv
  5. Complex-Time Cosmology: A Three-Sector Model of the Universe and the Probabilistic Interpretation of Cosmic Composition
    Yoshitaka Katakura
    Zenodo (CERN European Organization for Nuclear Research)PreprintCC BY17 citedCosmologyOpenAlex

Cite

BibTeXRIS
BibTeX
@misc{jimenez2026obstruction,
  title = {{An obstruction to cosmic acceleration from shift-symmetric dark sector interactions}},
  author = {Jose Beltrán Jiménez and Luis J. Garay and Erik Jensko and María Pérez Garrote},
  howpublished = {arXiv},
  year = {2026},
  month = nov,
  doi = {10.48550/arxiv.2611.05560},
  eprint = {2611.05560},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2611.05560},
}
RIS
TY  - UNPB
TI  - An obstruction to cosmic acceleration from shift-symmetric dark sector interactions
AU  - Jose Beltrán Jiménez
AU  - Luis J. Garay
AU  - Erik Jensko
AU  - María Pérez Garrote
PY  - 2026
DA  - 2026/11/03
PB  - arXiv
DO  - 10.48550/arxiv.2611.05560
UR  - https://arxiv.org/abs/2611.05560
AB  - Using the effective field theory of cosmological media, we show that derivative interactions in the dark sector between a perfect fluid and a superfluid cannot support slow-roll expansion while remaining free from instabilities. Furthermore, decomposing the dark sector medium into effective dark matter and dark energy components, we find that the stability conditions exclude a phantom-to-non-phantom crossing. Our approach gives a clear route for constructing theoretically viable dark sector models, and highlights the fundamental constraints that stability requirements impose on their cosmological dynamics.
ER  -