Instability of holographic dark energy models

By Y. S. Myung. 2007

155 citations recorded by the source corpus.

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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/9ad47ddb2d56c24e70e09f6cefcce1061c64dd9b

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In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Holographic dark energy (2016, background): “The stability of HDE is first studied in [264].”