Localization and entanglement of two interacting electrons in a quantum-dot molecule
Localization and entanglement of two interacting electrons in a quantum-dot molecule
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DOI：
10.1209/epl/i2001-00219-7
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发表时间：
2000-07
期刊：
影响因子：
1.8
通讯作者：
P. I. Tamborenea;H. Metiu
中科院分区：
文献类型：
--
作者：
P. I. Tamborenea;H. Metiu
通过数值计算包含库仑相互作用的双电子波函数随时间的演化，证明了耦合量子点半导体结构中两个相互作用电子的局域化.从基态到局域态的跃迁是由外部的、随时间变化的、均匀的电场引起的。结果发现，虽然一个适当的恒定场可以本地化的威尔斯中的一个的电子，振荡场可以诱导大致相等的概率为两个电子被本地化的任一井，产生一个有趣的类型的本地化和纠缠态。我们还表明，突然转移到一个适当的恒定值的字段可以保持在时间的本地化的两种类型。
The localization of two interacting electrons in a coupled-quantum-dots semiconductor structure is demonstrated through numerical calculations of the time evolution of the two-electron wave function including the Coulomb interaction between the electrons. The transition from the ground state to a localized state is induced by an external, time-dependent, uniform electric field. It is found that while an appropriate constant field can localize both electrons in one of the wells, oscillatory fields can induce roughly equal probabilities for both electrons to be localized in either well, generating an interesting type of localized and entangled state. We also show that shifting the field suddenly to an appropriate constant value can maintain in time both types of localization.