Instability of holographic dark energy models

2007/06/30 by Yun Soo Myung · 4 citations
Physics and Astronomy · #Astronomy #Astrophysics #Black Holes and Theoretical Physics #Chaplygin gas #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Cutoff #Dark energy #Event (particle physics) #Event horizon #Galaxies: Formation, Evolution, Phenomena #Holographic principle #Holography #Horizon #Instability #Mathematical physics #Perturbation (astronomy) #Physics #Quantum electrodynamics #Quantum mechanics #Tachyon #astro-ph #gr-qc #hep-th

paper · pdf · doi:10.1016/j.physletb.2007.07.033

published as Phys.Lett.B652:223-227,2007 · 11 pages, 4 eps figures, to appear in PLB

arxiv created 2007/07/20 · openalex publication_date 2007/07/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate the difference between holographic dark energy, Chaplygin gas, and tachyon model with constant potential. For this purpose, we examine their squared speeds of sound which are evaluated to zeroth order in perturbation theory and hence depends only on time. We find that the squared speed for holographic dark energy is always negative when choosing the future event horizon as the IR cutoff, while those for Chaplygin gas and tachyon are non-negative. This means that the perfect fluid for holographic dark energy is classically unstable. Hence the holographic interpretation for Chaplygin gas and tachyon is problematic.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Non-flat universe and interacting dark energy model
• Statefinder—A new geometrical diagnostic of dark energy
• Transition of the dark energy equation of state in an interacting holographic dark energy model
• Holographic tachyon model
• Prospects and problems of tachyon matter cosmology
• Supernova constraints on a holographic dark energy model
• The cosmological constant and dark energy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Preliminary Maps and Basic Results
• Interacting dark energy, holographic principle, and coincidence problem
• First‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Determination of Cosmological Parameters
• Dynamics of dark energy
• Three‐YearWilkinson Microwave Anisotropy Probe(WMAP) Observations: Implications for Cosmology
• A COMMENTARY ON COSMOLOGICAL ENTROPY BOUNDS
• Rolling Tachyon

Cited by

• Thermodynamic approach to holographic dark energy and the Rényi entropy
• Study of QCD generalized ghost dark energy in FRW universe
• A note on cosmological features of modified Newtonian potentials
• Interacting holographic generalized Chaplygin gas model