Prerequisites for Relevant Spectral Density and Convergence of Reduced Density Matrices at Low Temperatures
作者: Akihito Ishizaki
刊名: Journal of the Physical Society of Japan, 2020, Vol.89 (1)
来源数据库: The physical Society of Japan
DOI: 10.7566/JPSJ.89.015001
原始语种摘要: Hierarchical equations of motion approach with the Drude–Lorentz spectral density has been widely employed in investigating quantum dissipative phenomena. However, it is often computationally costly for low-temperature systems because a number of Matsubara frequencies are involved. In this note, we examine a prerequisite required for spectral density, and demonstrate that relevant spectral density may significantly reduce the number of Matsubara terms to obtain convergent results for low temperatures.
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关键词翻译
关键词翻译
  • prerequisite 必要前提
  • spectral 谱的
  • demonstrate 说明
  • employed 就业
  • phenomena 现象
  • motion 运动
  • density 密度
  • costly 昂贵的
  • relevant 有关联的
  • number 号码