On the multi-layer multi-configurational time-dependent Hartree approach for bosons and fermions.
On the multi-layer multi-configurational time-dependent Hartree approach for bosons and fermions.
复制标题
关于玻色子和费米子的多层多配置时间相关 Hartree 方法。
DOI:
10.1063/1.4975662
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Thomas Weike
中科院分区:
文献类型:
--
作者:
U. Manthe;Thomas Weike
A multi-layer multi-configurational time-dependent Hartree (MCTDH) approach using a second quantization representation (SQR) based on optimized time-dependent orbitals is introduced. The approach combines elements of the multi-layer MCTDH-SQR approach of Wang and Thoss, which employs a preselected time-independent orbital basis, and the MCTDH for bosons and multi-configuration time-dependent Hartree-Fock approaches, which do not use multi-layering but employ time-dependent orbital bases. In contrast to existing MCTDH-type approaches, the results of the present approach for a given number of configurations are not invariant with respect to unitary transformations of the time-dependent orbital basis. Thus a natural orbital representation is chosen to achieve fast convergence with respect to the number of configurations employed. Equations of motion for the present ansatz, called (multi-layer) MCTDH in optimized second quantization representation, are derived. Furthermore, a scheme for the calculation of optimized unoccupied single-particle functions is given which can be used to avoid singularities in the equations of motion.
影响因子:
2.9
作者:
Beinke, Raphael;Klaiman, Shachar;Alon, Ofir E.
通讯作者:
Alon, Ofir E.
DOI:
10.1063/1.3682091
发表时间:
2012
期刊:
The Journal of chemical physics
影响因子:
--
作者:
I. S. Ulusoy;M. Nest
通讯作者:
M. Nest