Reconstruction of modified <i>f</i>(<i>R</i>, <i>T</i>) with Λ(<i>T</i>) gravity in general class of Bianchi cosmological models
Bibliographic record
Abstract
A new class of cosmological models in f(R, T) modified theories of gravity (Harko et al. Phys. Rev. D, 84, 024020 (2011)) where the gravitational Lagrangian is given by an arbitrary function of Ricci scalar R and the trace of the stress–energy tensor T, have been investigated for a specific choice of f(R, T) = f 1 (R) + f 2 (T) in a general class of Bianchi universe. Our intention is to reconstruct f(R, T) models inspired by this special law for the deceleration parameter (Akarsu and Dereli. Int. J. Theor. Phys. 51, 612 (2012)), which is linear in time with negative slope in connection with the theories of modified gravity. In the present study we consider the cosmological constant Λ as a function of the trace of the stress energy–momentum tensor, and such a model is nicknamed “Λ(T) gravity”. Such models may exhibit better consistency with the recent cosmological observations. We analyze the variation of pressure, energy density, and cosmological terms with cosmic time and discuss their physical consequences. We also discuss physical and geometric properties of derived models.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".