标题： 强场系统中量子涨落的作用：流体动力学流动的出现 显示英文标题

标题： Role of quantum fluctuations in a system with strong fields: Onset of hydrodynamical flow

摘要： 量子涨落被认为在暴胀宇宙学中经典场的热化过程中起着重要作用，但它们在重离子碰撞中产生的经典场各向同化/热化中的相关性尚未完全理解。 我们考虑一个标量$\phi^4$简化模型，该模型与强外部源耦合，类似于紫外相对论重离子碰撞早期动力学的色玻璃凝聚描述。 标量场的主导阶经典演化因时间依赖的量子涨落的快速增长而显著改变，这需要对这些“长期”项进行全部阶次的重求和。 我们表明，重求和的表达式使系统按照理想流体力学演化。 我们简要评论了我们量子系统的热化以及我们的结果向规范理论的扩展。 显示英文摘要

摘要： Quantum fluctuations are believed to play an important role in the thermalization of classical fields in inflationary cosmology but their relevance for isotropization/thermalization of the classical fields produced in heavy ion collisions is not completely understood. We consider a scalar $\phi^4$ toy model coupled to a strong external source, like in the Color Glass Condensate description of the early time dynamics of ultrarelativistic heavy ion collisions. The leading order classical evolution of the scalar fields is significantly modified by the rapid growth of time-dependent quantum fluctuations, necessitating an all order resummation of such "secular" terms. We show that the resummed expressions cause the system to evolve in accordance with ideal hydrodynamics. We comment briefly on the thermalization of our quantum system and the extension of our results to a gauge theory.