We give a basic explanation for the oscillating properties of some physical quantities of a two-electron quantum dot in the presence of a static magnetic field. This behaviour was discussed in a previous work of ours (Maniero etal 2020 J. Phys. B: At. Mol. Opt. Phys. 53 185001) and was identified as a manifestation of the de Haas–van Alphen effect, originally observed in the framework of diamagnetism of metals in the 30s. We show that this behaviour is a consequence of different eigenstates of the system assuming, in a certain interval of the magnetic field, the condition of the lowest energy singlet and triplet states.

中文翻译：

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两电子量子点在磁场作用下的振荡特性

我们对存在静磁场的双电子量子点的某些物理量的振荡特性给出了基本解释。这种行为在我们之前的工作中讨论过（Maniero et al 2020 J. Phys. B: At. Mol. Opt. Phys. 53 185001），并被确定为de Haas-van Alphen效应的一种表现，最初在30 年代金属的抗磁性框架。我们表明，这种行为是系统不同本征态的结果，假设在磁场的某个间隔内，处于最低能量单线态和三线态的条件。