Entropy applications in cosmology: spacetime thermodynamics, holographic dark energy, entropic gravity and beyond - a review

arXiv:2609.28331 · astro-ph.CO, gr-qc, hep-th · Submitted 2026-09-23 · Read on arXiv

astro-ph.CO, gr-qc, hep-th

Submitted: 2026-09-23

Updated: 2026-09-23

Comments: 132 pages, 26 figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Entanglement — 76× in this paper · explained in 3 episodes
• Area Law — 55× in this paper · explained in 1 episode
• Entanglement Entropy — 43× in this paper · explained in 2 episodes
• Apparent Horizon — 39× in this paper · explained in 1 episode
• Consistency — 26× in this paper · explained in 3 episodes
• Generalization — 23× in this paper · explained in 13 episodes
• Quintessence — 19× in this paper · explained in 2 episodes
• Generalized Uncertainty Principle — 7× in this paper
• Cosmic Chronometers — 5× in this paper
• Fine-Tuning — 5× in this paper · explained in 5 episodes
• Bayesian Evidence — 4× in this paper
• Degeneracy — 4× in this paper · explained in 3 episodes
• Robustness — 4× in this paper · explained in 5 episodes
• Decoupling — 3× in this paper · explained in 2 episodes
• Hubble Tension — 3× in this paper · explained in 9 episodes
• Abundance — 2× in this paper · explained in 1 episode
• Additivity — 2× in this paper · explained in 1 episode
• Big Bang Observer — 2× in this paper
• Generalized and Extended Uncertainty Principle — 2× in this paper
• Self-consistency — 2× in this paper · explained in 2 episodes
• Trace — 2× in this paper · explained in 2 episodes
• Unified Framework — 2× in this paper · explained in 5 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Akaike Information Criterion — 1× in this paper
• Core — 1× in this paper · explained in 2 episodes
• Quantization — 1× in this paper · explained in 12 episodes
• Regularization — 1× in this paper · explained in 3 episodes
• Symmetry Breaking — 1× in this paper · explained in 3 episodes

Sources

• Entropy and Area
• Microscopic Origin of the Bekenstein-Hawking Entropy
• Quantum Geometry and Black Hole Entropy
• Logarithmic correction to the Bekenstein-Hawking entropy
• Entanglement entropy of black holes
• A Covariant Entropy Conjecture
• Dimensional Reduction in Quantum Gravity
• The World as a Hologram
• The Large N Limit of Superconformal Field Theories and Supergravity
• Thermodynamics of Spacetime: The Einstein Equation of State
• First Law of Thermodynamics and Friedmann Equations of Friedmann-Robertson-Walker Universe
• Thermodynamic Behavior of Friedmann Equation at Apparent Horizon of FRW Universe
• The Area of a Rough Black Hole
• Statistical mechanics in the context of special relativity
• Effective Field Theory, Black Holes, and the Cosmological Constant
• A Model of Holographic Dark Energy
• On the Origin of Gravity and the Laws of Newton
• The Thermodynamics of Black Holes
• Proof of Classical Versions of the Bousso Entropy Bound and of the Generalized Second Law
• Reformulating String Theory with the $1/N$ Expansion

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