arXivDaily arXiv每日学术速递 周一至周五更新
arXiv cond-mat/0209033cond-mat.mes-hall
收藏

耦合量子点的有效action和相互作用能

Effective action and interaction energy of coupled quantum dots

Sourin Das, Sumathi Rao

摘要:

我们得到的隧道耦合量子点的有效作用,通过模拟系统作为一个Luttinger液体与多个障碍。对于一个双点系统,我们发现,完美的电导谐振条件形成一个六边形的平面上的两个栅极电压控制的电子密度在每个点。我们还明确地得到的功能依赖的相互作用能和峰分裂的栅极电压控制点之间的隧穿和它们的充电能量。我们的结果与最近的实验结果符合得很好,由此我们得到了Luttinger相互作用参数$K=0.74$。

英文摘要:

We obtain the effective action of tunnel-coupled quantum dots, by modeling the system as a Luttinger liquid with multiple barriers. For a double dot system, we find that the resonance conditions for perfect conductance form a hexagon in the plane of the two gate voltages controlling the density of electrons in each dot. We also explicitly obtain the functional dependence of the interaction energy and peak-splitting on the gate voltage controlling tunneling between the dots and their charging energies. Our results are in good agreement with recent experimental results, from which we obtain the Luttinger interaction parameter $K=0.74$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑