AI 中文总结
该研究针对有限温度下纳米级厚度理想薄膜中受限电子的光学响应，采用路径积分蒙特卡罗方法量化量子多体效应，分析边界对德鲁德响应的破坏及相关参数的变化趋势。
AI 中文摘要
我们研究有限温度下受限电子长波长光学响应中的量子多体效应，模拟一维受限在纳米级厚度平板中的均匀电子气。我们展示平板边界如何破坏自由电荷载流子的理想德鲁德响应，产生源于表面和量子多体相互作用的散射效应。我们采用[Tiihonen等人，《物理评论A》113，053711]提出的最新路径积分蒙特卡罗（PIMC）方法高精度量化这些效应，对德鲁德和德鲁德-洛伦兹模型参数进行唯象拟合，揭示光学响应随密度、温度等物理参数及有限尺寸、量子统计等数值参数的多种变化趋势。
英文摘要
We study quantum many-body effects in the long-wavelength optical response of confined electrons at finite temperatures. We simulate homogeneous electron gas confined in one dimension into a slab of nanoscale thickness. We demonstrate how the slab boundaries break down the ideal Drude response of free charge carriers, giving rise to scattering effects due to both the surfaces and quantum many-body interactions. We use a recent path-integral Monte Carlo (PIMC) approach developed in [Tiihonen et al. Phys. Rev. A 113, 053711] to quantify these effects in high accuracy. We perform phenomenological fits to Drude and Drude-Lorentz models parameters, manifesting various trends of the optical response with physical parameters like density and temperature, and numerical effects like finite size and the quantum statistics.
Comments23 pages, 8 figures
