The peculiar case of the Viaggiu holographic dark energy

Abstract

We study the plausibility of a holographic dark energy (HDE) model using the form of horizon entropy proposed by Viaggiu in 2014. This form of entropy is a generalization of the usual Bekenstein-Hawking entropy, having an extra term arising due to the dynamical nature of horizons in an expanding universe. We examine this new HDE model in the context of a flat Friedmann-Lemaître-Robertson-Walker universe filled with two cosmic fluids -- dark matter in the form of dust and holographic dark energy generated by Viaggiu entropy. We consider the Hubble horizon and the future event horizon as characteristic length scales and study the evolution of the Universe within these frameworks. Our analysis reveals some intriguing findings that include a possible cosmic doomsday scenario in the future, and certain observations are in striking contrast to other HDE models studied in the literature.

arXiv comment9 pages, 2 figures, Matches published version

References in corpus (43)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• The Large N Limit of Superconformal Field Theories and Supergravity
• Dynamics of dark energy
• The Cosmological Constant and Dark Energy
• The World as a Hologram
• Cosmological Constant - the Weight of the Vacuum
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Phantom Energy and Cosmic Doomsday
• Dark Energy and the Accelerating Universe
• A Model of Holographic Dark Energy
• Effective Field Theory, Black Holes, and the Cosmological Constant
• Early Dark Energy Can Resolve The Hubble Tension
• Challenges for $\Lambda$CDM: An update
• General Laws of Black-Hole Dynamics
• Statistical mechanics in the context of special relativity
• The Physics of Cosmic Acceleration
• A Holographic Dark Energy Model from Ricci Scalar Curvature
• The Area of a Rough Black Hole
• Holographic Dark Energy
• Statistical mechanics in the context of special relativity II
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• Approaches to Understanding Cosmic Acceleration
• Generalized entropy formalism and a new holographic dark energy model
• New infrared cut-off for the holographic scalar fields models of dark energy
• Phenomenological parameterization of quintessence
• Thermodynamic approach to holographic dark energy and the Rényi entropy
• Early Dark Energy Cosmologies
• Holographic dark energy through Tsallis entropy
• Kaniadakis holographic dark energy and cosmology
• Quintessence and the Separation of CMB Peaks
• The generalized second law in universes with quantum corrected entropy relations
• Non-linear Structure Formation in Cosmologies with Early Dark Energy
• Spin-Coefficient Form of the New Laws of Black-Hole Dynamics
• The impact of Early Dark Energy on non-linear structure formation
• Observational constraints on interacting Tsallis holographic dark energy models
• Early dark energy and its interaction with dark matter
• First law of thermodynamics for dynamical apparent horizons and the entropy of Friedmann universes
• Bekenstein-Hawking entropy in expanding universes from black hole theorems
• Trapped surfaces and spherical closed cosmologies
• Trapped surfaces in spherical expanding open universes
• Viaggiu entropy and the generalized second law in a flat FLRW Universe
• Signatures of Very Early Dark Energy in the Matter Power Spectrum

Cited by in corpus (1)

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