Reducing the tension with exponential acoustic dark energy

Lu Yin

doi:10.1140/epjc/s10052-022-10020-w

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2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 78
https://doi.org/10.1140/epjc/s10052-022-10020-w

Regular Article - Theoretical Physics

Reducing the $H_{0}$ tension with exponential acoustic dark energy

Lu Yin¹^,2^a

¹ Center for Quantum Spacetime, Sogang University, 04107, Seoul, Korea
² Department of Physics, Sogang University, 04107, Seoul, Korea

^a yinlu@sogang.ac.kr

Received: 1 March 2021
Accepted: 12 January 2022
Published online: 27 January 2022

Abstract

The Hubble tension arises from different observations between the late-time and early Universe. We explore a new model with dark fluid, called the exponential acoustic dark energy (eADE) model, to relieve the Hubble tension. The eADE model gives an exponential form of the equation of state (EoS) in the acoustic dark energy, which is the first time to explore an exponential form for the EoS. In this model, the gravitational effects from the acoustic oscillations of the model can impact the CMB phenomena at the matter radiation equally epoch. We give the constraints of the eADE model by the current cosmological dataset. The comparison of the phenomena with the standard model can be shown through CMB and matter power spectra. The fitting results of our model have $H_{0} = 70 . 06_{- 1.09}^{+ 1.13}$ $H_0 = 70.06^{+1.13}_{-1.09}$ in 95 $%$ $\%$ C.L. and a smaller best-fit value than $Λ$ $\Lambda$ CDM.

© The Author(s) 2022

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