论文标题
非统一比约克的吸引子和跨系列的新颖特征
Novel features of attractors and transseries in non-conformal Bjorken flows
论文作者
论文摘要
在这项工作中,我们研究了结构对称性破坏对远程均衡流体流体动物的影响。我们找到了一种新型的跨系列解决方案,用于纵向增强不变的扩展等离子体的非统一流体动力方程。新的跨系解决方案揭示了由于不同物理尺度的相互作用而产生的丰富的物理结构。在完美的流体情况下,由于对数校正的出现,声音的非符合速度会减慢温度的冷却,这取决于粒子的质量。一旦包括粘性校正,这些术语将传播到跨系列的扰动和非扰动部门。对数质量贡献增加了knudsen数量的渐近值,同时降低了瞬态非流动力模式的阻尼速率,因此产生了非常缓慢的流体动物化过程,在极较晚的时候,流动线将流动线融合到其前向吸引子。自由流式扩展进行了修改,并接收由剪切式耦合引起的对数质量校正。在我们的工作中进行的全球流量结构和数值分析表明,剪切粘性张量和散装粘性压力的早期和后期吸引子的存在。
In this work we investigate the impact of conformal symmetry breaking on hydrodynamization of a far-from-equilibrium fluid. We find a new kind of transseries solutions for the non-conformal hydrodynamic equations of a longitudinal boost invariant expanding plasma. The new transseries solutions unveil a rich physical structure which arises due to the interplay of different physical scales. In the perfect fluid case the non-conformal speed of sound slows down the cooling of the temperature due to the emergence of logarithmic corrections that depends on the mass of the particle. These terms propagate into the perturbative and non-perturbative sectors of the transseries once viscous corrections are included. The logarithmic mass contributions increase the asymptotic value of the Knudsen number while decreasing the damping rate of the transient non-hydrodynamic modes and thus, yielding to an extremely slow hydrodynamization process where flow lines merge to their forward attractor at extremely late times. The early time free streaming expansion is modified and receives logarithmic mass corrections induced by the shear-bulk couplings. The global flow structure and numerical analyses carried out in our work demonstrate the existence of the early and late-time attractors for the shear viscous tensor and bulk viscous pressure.