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1)  two atoms
双原子
1.
By means of negativity and concurrence, we investigate the time evolution of the entanglement of the two atoms and the entanglement between the two modes in the system of two atoms interacting with two-mode fields.
本文应用negativity和concurrence两种纠缠度量标准,考察了双原子与双模光场相互作用系统中,原子间纠缠和光场模间纠缠随时间的演化规律,发现它们在时间演化过程中可以相互转换,在一定条件下两者具有很好的对应关系;对于两量子位系统,negativity和concurrence的取值范围一样,在判断纠缠存在与否的标准上也完全相同,但当系统处于混态时二者的大小不能始终保持一致。
2.
The properties of the phase evolution in the system of Raman interaction between two atoms and a single mode cavity field are studied in the cases of two atoms with dipole dipole interaction coupling to the field with different constants.
本文研究了双原子与单模光场拉曼相互作用系统中, 在光场和原子具有不同的耦合并计及原子间偶极- 偶极相互作用情况下,光场相位的演化特性。
2)  a pair of atoms
双原子
1.
The entropy evolution of a pair of atoms interacting with a single-mode vacuum field is investigated by using the quantum reduced entropy,and the influence of the atomic dipole-dipole interaction on the field entropy evolution is discussed.
用量子约化熵研究了双原子与单模真空场相互作用系统的场熵演化,并讨论了原子偶极-偶极相互作用对场熵演化的影响。
2.
The entanglement properties of a single-mode vacuum field interacting with a pair of atoms are investigated by using the quantum reduced entropy,and the influences of the atomic dipole-dipole interaction on the degree of the entanglement are discussed.
用量子约化熵研究了单模真空场与双原子相互作用的纠缠特性,讨论了原子偶极—偶极相互作用对其纠缠度的影响。
3)  double heteroatom
双杂原子
1.
Synthesis and characterization of zeolite Ti-V ZSM-5 containing double heteroatoms;
双杂原子Ti-V-ZSM-5分子筛的合成与表征
2.
Synthesis and characterization of zeolite Ti -Mn - ZSM- 5 containing double heteroatoms;
双杂原子Ti-Mn-ZSM-5分子筛的合成与表征
4)  diatomic bond
双原子键
1.
By means of the improved electrostatic three-center model of diatomic bonds and its expressions for physical quantities, the relations between effective bond charge density, bond-stretching force constant and characteristic frequency are fitted.
本文应用修正的双原子键三中心静电模型及其有关物理参量表达式,拟合了有效键电荷稠度与键的力常数和特征频率之间的关系;建立了偶极矩、核四极矩偶合常数中的场梯度及晶体非线性光学系数的近似理论表达式。
5)  biatomic chain
双原子链
1.
Lattice vibration of biatomic chain in free boundary condition;
自由边界双原子链的晶格振动
6)  divalent atom
双价原子
1.
A simple non -variational configuration-interaction theory is presented for the divalent atomic system with two electrons outside a closed shell core, such as an alkaline earth atom and its corresponding isoelectronic sequence.
详细分析一种简单的非变分式的组态相互作用理论,用于研究双价原子系统。
补充资料:改进的忽略双原子微分重叠
分子式:
CAS号:

性质:即改进的NDDO。它用半经验模型处理双中心排斥积分,其主要特点是把双原子的电荷分布 间的相互作用看成是两堆电荷分布的多极距相互作用之和,然后用实验数据优化参数。其参数仅包含单中心单电子能量Uμμ,轨道指数ξ以及βμA和αA,不仅所用参数比MINDO/3少,计算结果也比MINDO/3大有改进,而且机时只增加20%。

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