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Thermodynamics in new model of loop quantum cosmology

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arxiv 2111.05660 v1 pith:PFGKUG6Y submitted 2021-11-10 gr-qc

Xiangdong Zhang This is my paper · ORCID
classification gr-qc
keywords effectivethermodynamicscosmologydensitylooplorentzmodelpressure
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abstract

The thermodynamic properties of loop quantum cosmology (LQC) without considering the Lorentz term were established in \cite{Zhu09}. In this paper, we extend this result to the recent proposed new model of LQC with the Lorentz term. We investigate the thermodynamics of LQC on the apparent horizon of the Friedmann-Lematre-Robertson-Walker universe. The result shows that the effective density and effective pressure in the modified Friedmann equation of LQC not only determines the evolution of the universe but can also serve as the thermodynamic quantities. Moreover, with the help of the Misner-Sharp energy, the first law of thermodynamics of the LQC is still valid as expected. This in turn endows precise physical meaning to the effective matter density $\rho_{eff}$ and the effective pressure $P_{eff}$.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Entropy in Loop Quantum Cosmology

    gr-qc 2025-05 conditional novelty 4.0 of 10

    For flat loop quantum cosmology with logarithmic entropy corrections, the standard generalized second law fails just after the bounce for most correction values, and a sign-flipped law with negative temperatures is va...

  2. An Extended Second Law of Thermodynamics

    gr-qc 2025-10 reject novelty 3.0 of 10

    The paper postulates that the second law should read sign(T)dS ≥ 0, permitting entropy decrease for negative-temperature systems, and illustrates it with LQC and Onsager vortices.

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