低温下准共振散射体的辐射俘获增强
Enhancement of radiation trapping for quasi-resonant scatterers at low temperature
摘要：
本文提出了低温准共振原子气体中辐射非相干传输的输运方程。推导是基于一个广义的Bethe-Salpeter方程考虑到原子的运动。所得方程与辐射转移方程相似。它是由原来的Monte Carlo方法的情况下，板的几何形状数值求解。由散射体的小速度引起的部分频率重分布使得系统外部的发射通量和介质内部的能量密度表现出与完全频率重分布的情况不同。特别是，比强度（逃逸因子）的长时间依赖性与Holstein预测略有不同。
英文摘要：
We present a transport equation for the incoherent propagation of radiation inside a quasi-resonant atomic gas at low temperature. The derivation is based on a generalized Bethe-Salpeter equation taking into account the motion of the atoms. The obtained equation is similar to the radiative transfer equation. It is solved numerically by an original Monte Carlo approach in the case of a slab geometry. The partial frequency redistribution caused by the small velocity of the scatterers make the emitted flux outside the system and the energy density inside the medium to behave differently than in the case of complete frequency redistribution. In particular, the long time dependence of the specific intensity (escape factor) is slightly different from the Holstein prediction.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
