发表机构
Lebedev Physical Institute, Russian Academy of Sciences（俄罗斯科学院列别捷夫物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对有限尺寸量子场系统的质量量子猝灭，通过单圈近似数值求解Keldysh关联函数自洽方程，揭示了周期性边界条件诱导的反向涨落波前干涉引发的有效质量扰动效应。
AI 中文摘要
本工作从理论上研究有限尺寸系统中量子标量场在经历质量量子猝灭后的关联函数非平衡演化。在单圈近似下数值求解Keldysh（统计）关联函数的自洽方程，观测到特定时空效应：在约等于系统尺寸一半的时刻，有效质量会出现强烈扰动。研究表明，该效应由光锥内传播的反向涨落波前干涉驱动，而反向涨落波前是周期性边界条件诱导产生的。
英文摘要
In this work, we theoretically investigate the non-equilibrium evolution of the correlation functions of a quantum scalar field following a mass quantum quench in a finite-size system. The self-consistent equation for the Keldysh (statistical) correlation function is solved numerically in the one-loop approximation. A specific spatio-temporal effect is observed: at a point in time approximately equal to half the system size, the effective mass experiences a strong disturbance. It is shown that this effect is driven by the interference of counter-propagating wave fronts of fluctuations that propagate within the light cone and is induced by periodic boundary conditions.
