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VALIDITY OF THE THERMODYNAMICAL PROPERTIES OF THE DARK ENERGY MODEL WITH THE EQUATION OF STATE: w = w₀ + w₁ · z(1 + z)/(1 + z²)

LILI XING

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, Liaoning 116024, P. R. China

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JIANBIN CHEN

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, Liaoning 116024, P. R. China

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YUANXING GUI

School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian, Liaoning 116024, P. R. China

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ERIC M. SCHLEGEL

Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, TX 78249, USA

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, and

JIANBO LU

Department of Physics, Liaoning Normal University, Dalian 116029, P. R. China

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https://doi.org/10.1142/S0217732311035183Cited by:2 (Source: Crossref)

Abstract

We investigate the validity of the thermodynamical properties of the universe in a new parametric model of dark energy with the equation of state w = w₀ + w₁ · z(1 + z)/(1 + z²). In the spatially homogeneous and isotropic universe, assuming that the temperature and entropy in cosmology is as in a black hole, we examine the thermodynamical properties of the universe bounded by the apparent horizon and the event horizon respectively. By analysis, we find that the first and the second laws of thermodynamics are valid inside the apparent horizon, while they break down inside the event horizon.

Keywords:

PACS: 98.80.-k, 98.80.Cq

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