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arXiv 2307.03060gr-qc
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AdS时空中热、冷和裸Einstein-Maxwell-标量黑洞的非线性动力学

Nonlinear dynamics of hot, cold and bald Einstein-Maxwell-scalar black holes in AdS spacetime

Qian Chen, Zhuan Ning, Yu Tian, Bin Wang, Cheng-Yong Zhang

AI总结:

本文通过线性微扰与非线性动力学模拟研究AdS时空中Einstein-Maxwell-标量黑洞在基态与激发态间的转变,揭示标量场吸积的临界现象、动力学势垒及零阈值临界动力学,并发现特定参数下非零微扰无法触发激发态不稳定模式。

摘要:

我们研究了反德西特时空中Einstein-Maxwell-标量引力系统在两个局部基态和一个激发态之间的动力学转变过程。从线性微扰理论来看,只有激发态具有单一不稳定模式,表明其动力学不稳定性。这种不稳定性与事件视界附近存在有效势阱所导致的快子不稳定性有关。通过非线性动力学模拟,利用标量场吸积机制,揭示了该引力系统在两个局部基态之间转变过程中的临界现象。吸积强度的阈值表明该转变过程中存在一个动力学势垒,该势垒依赖于标量场与Maxwell场之间的耦合强度。另一方面,对于不稳定的激发态,存在一种特殊的临界动力学,其微扰强度阈值为零。不同符号的微扰推动引力系统落入不同的局部基态。有趣的是,在扩展的参数空间中,存在特定参数使得非零振幅的微扰无法触发激发态的单一不稳定模式。

英文摘要:

We investigate the dynamical transition processes of an Einstein-Maxwell-scalar gravitational system between two local ground states and an excited state in the anti-de Sitter spacetime. From the linear perturbation theory, only the excited state possesses a single unstable mode, indicating the dynamical instability. Such an instability is associated with the tachyonic instability due to the presence of an effective potential well near the event horizon. From the nonlinear dynamics simulation, through the scalar field accretion mechanism, the critical phenomena in the transition process of the gravitational system between the two local ground states are revealed. The threshold of the accretion strength indicates the existence of a dynamical barrier in this transition process, which depends on the coupling strength between the scalar and Maxwell fields. On the other hand, for the unstable excited state, there exists a special kind of critical dynamics with a zero threshold for the perturbation strength. The perturbations of different signs push the gravitational system to fall into different local ground states. Interestingly, in an extended parameter space, there exist specific parameters such that the perturbations of non-zero amplitude fail to trigger the single unstable mode of the excited state.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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