Physics

Gravitation

Spacetime

Mathematical physics

Musical

Entropy (arrow of time)

Tsallis entropy

Visual arts

Event horizon

Holography

Dark energy

Apparent horizon

Holographic principle

Cosmology

Cutoff

Theoretical physics

Quantum mechanics

Formalism (music)

Friedmann–Lemaître–Robertson–Walker metric

Classical mechanics

Physics Letters B

Recently, the Rényi and Tsallis generalized entropies have extensively been used in order to study various cosmological and gravitational setups. Here, using a special type of generalized entropy, a generalization of both the Rényi and Tsallis entropy, together with holographic principle, we build a new model for holographic dark energy. Thereinafter, considering a flat FRW universe, filled by a pressureless component and the new obtained dark energy model, the evolution of cosmos has been investigated showing satisfactory results and behavior. In our model, the Hubble horizon plays the role of IR cutoff, and there is no mutual interaction between the cosmos components. Our results indicate that the generalized entropy formalism may open a new window to become more familiar with the nature of spacetime and its properties.

Generalized entropy formalism and a new holographic dark energy model