Full control of quadruple quantum dot circuit charge states in the single electron regime
Full control of quadruple quantum dot circuit charge states in the single electron regime
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DOI：
10.1063/1.4875909
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发表时间：
2014-05-05
影响因子：
4
通讯作者：
Tarucha, S.
中科院分区：
文献类型：
--
作者：
Delbecq, M. R.;Nakajima, T.;Tarucha, S.
我们报告实现了一个阵列的四个隧道耦合量子点在单电子制度，这是第一个必要的一步走向可扩展的固态自旋量子位架构。我们实现了系统的有效可调谐性，但也发现，实现自旋封锁读出的条件并不像双量子点和三量子点电路那样直接获得。我们使用一个简单的电容模型的串联四重量子点电路，以调查其复杂的电荷状态图，并能够找到最合适的配置，为未来的泡利自旋封锁测量。然后，我们通过实验实现了相应的电荷态与我们的模型有很好的一致性。(C)2014 AIP出版有限责任公司。
We report the realization of an array of four tunnel coupled quantum dots in the single electron regime, which is the first required step toward a scalable solid state spin qubit architecture. We achieve an efficient tunability of the system but also find out that the conditions to realize spin blockade readout are not as straightforwardly obtained as for double and triple quantum dot circuits. We use a simple capacitive model of the series quadruple quantum dots circuit to investigate its complex charge state diagrams and are able to find the most suitable configurations for future Pauli spin blockade measurements. We then experimentally realize the corresponding charge states with a good agreement to our model. (C) 2014 AIP Publishing LLC.