从高斯基数组中导出的过渡电流密度的质量
Chou-Hsun Yang1, Yao-Wen Chang2,3, Liang-Yan Hsu2,3,4
1Institute of Chemistry, Academia Sinica, 128 Section 2 Academia Road, Nankang, Taipei 115, Taiwan.
The Journal of chemical physics
|January 26, 2026
概括
本研究探讨了量子系统的过渡电流密度 (TCD) 计算. 一种新的过技术提高了TCD的物理一致性,这对于准确的发光和能量转移建模至关重要.
科学领域:
- 量子力学就是量子力学.
- 计算化学计算化学
- 量子电动力学 量子电动力学
背景情况:
- 对于发光和能量转移的传统量子力学模型依赖于过渡二极体,这些二极体无法捕捉较大的系统的减速和极子效应.
- 基于宏观量子电力学的过渡电流密度 (TCD) 方法通过包括减速和极子效应来解决这些局限性.
- 从初始计算中获得的TCD的准确性尚未被彻底调查.
研究的目的:
- 在1和2电子系统中评估过渡二极管和TCD之间的数值等价性.
- 为了评估连续性方程 (·Jnm = -iωnmρnm) 对TCD计算的有效性.
- 开发方法来提高TCD计算的物理一致性.
主要方法:
- 从 H2+,HeH+ 和 H2 的过渡电荷密度和 TCD 来计算过渡双极.
- 通过比较过渡电荷密度 (rnm) 和TCD (Jnm) 的分歧来检查连续性方程.
- 实施了反向空间选技术,以减轻TCD计算中的虚假振荡.
主要成果:
- 过渡双极时刻显示了这两种方法之间的密切一致.
- 观察到连续性方程的实质性违反,归因于高斯式轨道中的工件.
- 反对空间过有效地抑制了非物理振荡,增强了TCD的物理一致性.
结论:
- 虽然过渡二极体和TCD在数值上对于小系统是相似的,但连续性方程突出了差异.
- 高斯式轨道器件可以在TCD计算中导致非物理结果.
- 开发的相互空间过技术为提高过渡电流计算的可靠性提供了实际解决方案.
相关概念视频
01:21Current Density
5.1K
The total amount of current flowing through one unit value of a cross-sectional area is referred to as current density. If the current flow is uniform, the amount of current flowing through a conductor is the same at all points along the conductor, even if the conductor area varies. The current density consists of the local magnitude and direction of the charge flow, which varies from point to point. Current density is measured in amperes per meter square, and direction is defined as the net...
5.1K
01:25Boundary Conditions for Current Density
1.3K
Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.
1.3K
02:31Phase Transitions
23.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.1K
02:58Properties of Transition Metals
29.7K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
29.7K
01:58Cooperative Allosteric Transitions
8.7K
Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
8.7K
02:39Phase Transitions: Vaporization and Condensation
20.9K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules...
20.9K