论文标题
经典统计模拟中的气泡成核和量子初始条件
Bubble nucleation and quantum initial conditions in classical statistical simulations
论文作者
论文摘要
经典的晶格模拟提供了对量子外量子场理论的有用的近似值，但仅针对表现出较大职业数量的系统，而仅针对本质上本质上量子机械的现象。在某些特殊情况下，可以使用类似量子的零点波动初始化此类实时模拟。我们将重新审视这些点，并调查报告说，可以通过这种类似量子样的初始条件的经典演化来计算1+1维的量子气泡成核速率。 We find that although intriguing, the reported numerical agreement between classical-statistical simulations and the quantum nucleation rate in 1+1 dimensions is a coincidence, which is not specific to this choice of initialisation, is parameter and lattice cut-off dependent and disappears as the number of space-dimensions increases from 1+1 to 2+1
Classical-statistical lattice simulations provide a useful approximation to out-of-equilibrium quantum field theory, but only for systems exhibiting large occupation numbers, and only for phenomena that are not intrinsically quantum mechanical in nature. In certain special circumstances, it can be appropriate to initialize such real-time simulations with quantum-like zero-point fluctuations. We will revisit these points, and investigate reports that quantum bubble nucleation rates in 1+1 dimensions can be computed through the classical evolution of such a quantum-like initial condition. We find that although intriguing, the reported numerical agreement between classical-statistical simulations and the quantum nucleation rate in 1+1 dimensions is a coincidence, which is not specific to this choice of initialisation, is parameter and lattice cut-off dependent and disappears as the number of space-dimensions increases from 1+1 to 2+1
