主持人:李志兵 教授
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【Abstract】
Singly-excited singlet-triplet pairs of states of two-electron spherically symmetric systems are revisited.
In addition to the obvious two-electron atom we consider the two-electron quantum dot confined by either a harmonic potential or by
an infinite spherical well, the confined two-electron atom, and three variants of an atom immersed in a plasma, modeled by the
screened Coulomb (Debye) potential. The validity of Hund's multiplicity rule is confirmed, and the contribution of the inter-particle repulsion
energy to the singlet-triplet splitting is examined. Whereas in atomic highly positive ions the inter-electronic repulsion is lower in the triplet
than in the corresponding singlet state, this ordering is reversed in neutral atoms. Such reversal does not take place in quantum dots.
Confined and screened systems exhibit more nuanced behavior. The analysis utilizes appropriate variants of the virial and Hellmann-Feynman theorems.
【Bigoraphy】
Jacob Katriel教授在以色列理工学院获学士、硕士和博士学位,后留校任教,曾任物理化学系主任、化学学院院长和多个以色列理工学院属下委员会成员(包括工会)。其研究领域为物质及辐射的量子论及其相关的数学研究(原子和分子电子结构,相变理论,量子光学),尤其是量子力学的多体问题。他同时也在内盖夫核子研究中心进行科研,多次访问欧洲、北美和亚洲的高校和科研机构。
Jacob Katriel教授执教于以色列理工学院,教授物理和量子化学课程,也在以色列本古里安大学、贝尔谢巴、魏兹曼研究所、雷霍沃特、以色列公开大学、拿撒勒研究所和美国华盛顿大学教授本科生及研究生课程,是Journal of Quantum Chemistry、Journal of Mathematical Chemistry期刊编辑委员会成员