论文标题
Brans-Dicke宇宙学中的Barrow全息暗能
Barrow holographic dark energy in the Brans-Dicke cosmology
论文作者
论文摘要
我们通过使用全息原理来构建Brans-Dicke宇宙学中暗能量的全息模型，该模型考虑了手推车熵而不是标准的Bekenstein-Hawking One。前者源于在宇宙学框架中考虑到黑洞物理学的量子杀伤作用，并根据重力 - 热力学的猜想。为了探索我们的模型的宇宙学后果，我们将哈勃的视野视为IR截断。我们研究了与标志性和线性相互作用的非相互作用和相互作用的案例，表明它们可以解释宇宙膨胀的当前加速阶段，与标准全息图暗能模型相反。然后，我们使用平方的音速执行经典稳定性分析。我们发现，尽管非相互作用模型对小扰动是不稳定的，但可签名的相互作用的模型仅适用于模型参数的合适值才能稳定。另一方面，线性相互作用模型始终预测稳定的宇宙。讨论了我们模型与宇宙学观察的一致性。
We construct a holographic model for dark energy in the Brans-Dicke cosmology by using the holographic principle considering the Barrow entropy instead of the standard Bekenstein-Hawking one. The former arises from the effort to account for quantum-gravitational effects in black-hole physics and, according to the gravity-thermodynamic conjecture, in the cosmological framework. In order to explore the cosmological consequences of our model, we consider the Hubble horizon as the IR cutoff. We investigate both the non-interacting and interacting cases with the sign-changeable and linear interactions, showing that they can explain the present accelerated phase of the Universe expansion, in contrast to the standard Holographic Dark Energy model. We then perform the classical stability analysis using the squared sound speed. We find that, whilst the non-interacting model is unstable against the small perturbations, the sign-changeable interacting one can be stable only for suitable values of the model parameters. On the other hand, the linear interacting model always predicts a stable Universe. The consistency of our model with cosmological observations is discussed.
