{
  "annotation_id": "8b216890-a6ac-4195-ae20-c6e95c60c417",
  "date_created": "2026-02-17T05:53:26.418000Z",
  "date_modified": "2026-02-17T05:53:26.418000Z",
  "file_hash": "b972572569e815d390341fc09d3ce09f2dc13624884f055165a9c00eecd8d25e",
  "private": false,
  "record": {
    "abstract": "We investigate late-time cosmology in the context of modified $f(Q,L_m)$ gravity, considering a non-linear model$ f(Q,L_m) = \\alpha Q + \\beta L_m^n + \\lambda$ where, $\\alpha$, $\\beta$, $\\lambda$, and $n$ are some free parameters. The modified Friedmann equations are derived for a barotropic cosmic fluid, and an analytical solution for the Hubble parameter $H(z)$ is obtained. Using the latest DESI DR2 BAO data, previous BAO compilations (P-BAO), and cosmic chronometer (CC) datasets, we constrain the model parameters through a Markov Chain Monte Carlo analysis. Our results show that the model successfully describes the observed late-time cosmic acceleration with slightly tighter constraints from the inclusion of DESI dataset. The present-day Hubble constant is determined as $H_0 \\simeq 69.5\\ \\mathrm{km\\ s^{-1}\\ Mpc^{-1}}$, while the deceleration parameter confirms accelerated expansion with $q_0 \\simeq -0.57$. The transition redshift, where the universe switches from deceleration to acceleration, occurs in the range $z_{\\rm tr} \\sim 0.56 - 0.77$. Similarly, a smooth and physically consistent transition from a matter-dominated decelerated period at high redshifts to an accelerated phase at late times is revealed by the evolution of $\\omega_{eff}(z)$. While statefinder diagnostic shows the model favours a Chaplygin gas like nature for DESI and DESI+CC, whereas the model favours as quintessence dominated evolution for P-BAO+CC in the late time regime. Conclusively, all these results along with the study of the energy conditions and stability analysis showcases the given $f(Q,L_m)$ model offers a viable alternative to GR-based cosmology",
    "arxiv_id": "2601.10627",
    "authors": [
      "Rajdeep Mazumdar",
      "Kalyan Malakar",
      "Kalyan Bhuyan"
    ],
    "categories": [
      "gr-qc"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Dynamics of Late time cosmology in $f(Q,L_{m})$ Gravity with Constraints from DESI DR2 BAO Data",
    "url": "https://arxiv.org/abs/2601.10627",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5f9e7250-2f0d-4a11-8435-4a8cc7143e42",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}