标题： 近似单位费米气体中的早期时间流体动力学吸引子 显示英文标题

标题： Early time hydrodynamic attractor in a nearly-unitary Fermi gas

摘要： 流体动力学吸引子范式旨在通过不同初始状态下的普遍行为的出现，来解释在RHIC和LHC的超相对论核碰撞中流体动力学的快速适用性。 理论模型中观察到的吸引子首先由物质的快速膨胀驱动，随后转变为指数衰减的瞬态激发物向粘性流体区域的衰减。 最近提出了一种理论方案，如何在冷原子气体中实现流体动力学吸引子，重点在于瞬态的衰减，并为未来在桌面实验中的实验实现开辟了前景。 受此启发，本文中我们展示了在完全理论控制下的近单位费米气体动力学模型中，流体动力学吸引子的远离平衡、由膨胀驱动的部分是如何出现的。 显示英文摘要

摘要： The hydrodynamic attractors paradigm aims to explain fast applicability of hydrodynamics at ultrarelativistic nuclear collisions at RHIC and LHC in terms of the emergence of a universal behaviour across different initial states. The attractors observed in theoretical models are first driven by a rapid expansion of matter, which later gives way to the decay of exponentially damped transient excitations into the viscous fluid regime. Recently a theoretical proposal was made how to realize hydrodynamic attractors in cold atomic gases focusing on the decay of transients and opening prospects for a future experimental realization in table top experiments. Motivated by this, in the present paper we show how the far-from-equilibrium, expansion-driven part of the hydrodynamic attractor emerges in a model of a nearly-unitary Fermi gas dynamics under full theoretical control.