...
首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Compact MCTDH wave functions for high-dimensional system-bath quantum dynamics
【24h】

Compact MCTDH wave functions for high-dimensional system-bath quantum dynamics

机译:紧凑的MCTDH波函数可用于高维系统浴量子动力学

获取原文
获取原文并翻译 | 示例
           

摘要

We employ a simple multiconfiguration time-dependent Hartree (MCTDH) ansatz tailored to an effective-mode transformation of environmental variables that brings the bath into a linear chain form. In this form, important (primary) degrees of freedom can be easily identified and treated at a high correlation level, whereas secondary modes are left uncorrelated. The resulting approach scales linearly with the bath dimensions and allows us to easily access recurrence times much longer than usually possible, at a very small computational cost. Test calculations for model atom-surface problems show that the system dynamics is correctly reproduced in the relevant time window, and quantitative agreement is attained for energy relaxation and sticking, particularly in non-Markovian environments. These results pave the way for tackling realistic system-bath quantum dynamical problems on the picosecond scale.
机译:我们采用了一种简单的多配置时间相关Hartree(MCTDH)ansatz,它适合于环境变量的有效模式转换,该环境变量将水浴变为线性链形式。以这种形式,重要的(主要)自由度可以很容易地被识别并以较高的相关度进行处理,而次要模式则不相关。所产生的方法与熔池尺寸成线性比例,并且使我们能够以非常小的计算成本轻松获得比通常更长的重复时间。模型原子表面问题的测试计算表明,系统动力学可以在相关的时间窗口中正确再现,并且在能量松弛和粘附方面达到了定量一致,特别是在非马尔可夫环境中。这些结果为在皮秒级解决现实的系统浴量子动力学问题铺平了道路。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号