发表机构
Universidade Federal de Santa Catarina; Unicamp(圣卡塔琳娜联邦大学; 坎皮纳斯州立大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
针对现有截断方法在远离平衡态时失效的问题,本文提出ShARK框架,一种全三维蒙特卡洛动力学方法,能精确求解弛豫时间玻尔兹曼方程并强制执行输运系数,经Bjorken和Gubser流验证,在截断方法失效处复现精确结果。
AI 中文摘要
弛豫时间玻尔兹曼方程描述了远离平衡态的相对论性物质,但现有方法依赖于有限阶截断,这些截断在此状态下失效。我们引入了ShARK(随机平流弛豫动力学),这是首个全三维蒙特卡洛动力学框架,能够捕获任意初始条件下精确的、远离平衡态的超相对论动力学,同时直接强制执行目标输运系数,并收敛到精确的Anderson-Witting解。该框架经Bjorken和Gubser流验证,在截断方法失效的情况下复现了精确的动力学结果。
英文摘要
The relaxation-time Boltzmann equation governs relativistic matter far from equilibrium, but existing approaches rely on finite-order truncations that break down in this regime. We introduce ShARK (Stochastic Advection Relaxation Kinetics), the first fully 3D Monte Carlo kinetic framework to capture exact, far-from-equilibrium ultrarelativistic dynamics for arbitrary initial conditions while directly enforcing target transport coefficients, converging to the exact Anderson-Witting solution. Validated against the Bjorken and Gubser flows, the framework reproduces the exact kinetic result where truncated methods fail.
Comments7 pages, 4 figures