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arXiv 2408.09679hep-th
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一阶相变附近全息稳态流的动力学

Dynamics of holographic steady flows near a first-order phase transition

Qian Chen, Yuxuan Liu, Yu Tian, Xiaoning Wu, Hongbao Zhang

AI总结:

本文研究全息一阶相变模型中稳态流的动力学,发现相分离态中流速与潜热表征共存相间隙,并揭示运动高能相遇障碍物时的反弹、钉扎、通过和分裂四种行为。

摘要:

我们研究了一个全息一阶相变模型中稳态流的物理性质,将研究范围从平衡态热力学扩展到远离平衡态的实时动力学。通过旋节线分解或凝聚核,可以实现具有非零动量的相分离状态。在这种情形下,我们观察到共存相之间存在间隙,这不仅源于能量密度的变化,还源于动量密度或纵向压力的差异。这些差异通过流速和潜热来表征。此外,通过引入一个非均匀的标量外源来模拟固定障碍物,我们揭示了运动系统中动量损失的动力学响应。值得注意的是,从具有均匀流速的初始相分离状态出发,随后使其与障碍物相互作用,我们发现运动的高能相表现出四种特征性动力学行为——反弹、钉扎、通过和分裂。这些行为取决于相的速度和障碍物的强度。

英文摘要:

We investigate the physical properties of steady flows in a holographic first-order phase transition model, extending from the thermodynamics at equilibrium to the real-time dynamics far from equilibrium. Through spinodal decomposition or condensation nuclei, the phase-separated state with non-zero momentum can be achieved. In this scenario, we observe a gap between coexisting phases, arising not only from the variations in energy density, but also from the distinctions in momentum density or longitudinal pressure. These disparities are characterized by flow velocity and latent heat. Furthermore, by introducing an inhomogeneous scalar external source to simulate a fixed obstacle, we reveal the dynamical response of momentum loss in the moving system. Notably, starting from an initial phase-separated state with uniform flow velocity, and subsequently interacting it with an obstacle, we find that the moving high-energy phase exhibits four characteristic dynamical behaviors -- rebounding, pinning, passing, and splitting. These behaviors depend on the velocity of the phase and the strength of the obstacle.

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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