Charge qubit entanglement in double quantum dots

被引：13

作者：

Weiss, S. ^{[1
]}

Thorwart, M. ^{[1
]}

Egger, R. ^{[1
]}

机构：

[1] Univ Dusseldorf, Inst Theoret Phys, D-40225 Dusseldorf, Germany

来源：

EUROPHYSICS LETTERS | 2006年 / 76卷 / 05期

关键词：

D O I：

10.1209/epl/i2006-10342-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study entanglement of charge qubits in a vertical tunnel-coupled double quantum dot containing two interacting electrons. Exact diagonalization is used to compute the negativity characterizing entanglement. We find that entanglement can be efficiently generated and controlled by sidegate voltages, and describe how it can be detected. For large enough tunnel coupling, the negativity shows a pronounced maximum at an intermediate interaction strength within the Wigner molecule regime.

引用

页码：905 / 911

页数：7

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