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Some Remarks on Alternative (or Modified) Theories of Gravity

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arxiv 2311.14446 v1 pith:DVPWUSKU submitted 2023-11-24 gr-qc astro-ph.COhep-th

Some Remarks on Alternative (or Modified) Theories of Gravity

classification gr-qc astro-ph.COhep-th
keywords somegeneralgravityrelativitytheoriesaddressaldrovandialternative
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A seminar given about 30 years ago by Ruben Aldrovandi motivates this text where some reflexions about constructing theories that modify General Relativity are made. Two particular cases, the Brans-Dicke and Unimodular Gravity ones, are discussed, in a quite qualitative way, showing on how they can address some of the most outstanding problems of General Relativity, specially the transplanckian physics and the cosmological constant problem.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Emergent $\text{AdS}_{d+1}$ Geometry from Functional Renormalization Group via Bulk Metric Reconstruction

    hep-th 2026-05 unverdicted novelty 6.0

    Functional renormalization group applied to the O(N) vector model generates an emergent regular AdS_{d+1} geometry whose near-horizon thermodynamics reproduces the first law and Bekenstein-Hawking area law with temper...

  2. Emergent $\text{AdS}_{d+1}$ Geometry from Functional Renormalization Group via Bulk Metric Reconstruction

    hep-th 2026-05 unverdicted novelty 5.0

    Functional renormalization group flow of the O(N) vector model produces an emergent AdS_{d+1} geometry under the massless critical condition.

  3. Emergent $\text{AdS}_{d+1}$ Geometry from Functional Renormalization Group via Bulk Metric Reconstruction

    hep-th 2026-05 reject novelty 3.0

    The paper claims an FRG derivation of emergent AdS geometry for the O(N) vector model, but the derivation's key step contradicts its own equations.