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PreprintCC BY 4.0Zenodo

Review Note: On the derivation in N. Kumar, "On the Accelerated Expansion of the Universe," arXiv:2406.04392

  • Michael VanBeuzekom1
  1. 1Independent researcher
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Abstract

A derivation audit of N. Kumar, "On the Accelerated Expansion of the Universe" (Gravit. Cosmol. 30, 85–88, 2024; arXiv:2406.04392v4). The note finds that the passage from eq. (14) to eq. (15) is not established: the identification of null-cut second variations with cosmic-time second derivatives (eq. 18 of the v4 addendum) is assumed rather than derived. It credits the author's clarifications and records withdrawn objections. It is not an empirical test, and it does not claim that universe–antiuniverse models are false.

Keywords - quantum null energy condition; modular Hamiltonian; cosmic acceleration; universe–antiuniverse; derivation audit

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Cite

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BibTeX
@misc{vanbeuzekom2026review,
  title = {{Review Note: On the derivation in N. Kumar, "On the Accelerated Expansion of the Universe," arXiv:2406.04392}},
  author = {Michael VanBeuzekom},
  howpublished = {Zenodo},
  year = {2026},
  month = oct,
  doi = {10.5281/zenodo.23594915},
  url = {https://zenodo.org/records/23594915},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Review Note: On the derivation in N. Kumar, "On the Accelerated Expansion of the Universe," arXiv:2406.04392
AU  - Michael VanBeuzekom
PY  - 2026
DA  - 2026/10/23
PB  - Zenodo
DO  - 10.5281/zenodo.23594915
UR  - https://zenodo.org/records/23594915
AB  - A derivation audit of N. Kumar, "On the Accelerated Expansion of the Universe" (Gravit. Cosmol. 30, 85–88, 2024; arXiv:2406.04392v4). The note finds that the passage from eq. (14) to eq. (15) is not established: the identification of null-cut second variations with cosmic-time second derivatives (eq. 18 of the v4 addendum) is assumed rather than derived. It credits the author's clarifications and records withdrawn objections. It is not an empirical test, and it does not claim that universe–antiuniverse models are false.  Keywords - quantum null energy condition; modular Hamiltonian; cosmic acceleration; universe–antiuniverse; derivation audit
ER  -