Control of spin blockade by ac magnetic fields in triple quantum dots

被引：66

作者：

Busl, Maria ^{[1
]}

Sanchez, Rafael ^{[2
]}

Platero, Gloria ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat Madrid, Madrid 28049, Spain

[2] Univ Geneva, Dept Phys Theor, CH-1211 Geneva 4, Switzerland

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 12期

关键词：

SINGLE-ELECTRON SPIN; COHERENT; OSCILLATIONS; RESONANCE;

D O I：

10.1103/PhysRevB.81.121306

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze coherent spin phenomena in triple quantum dots in triangular configuration under crossed dc and ac magnetic fields. In particular, we discuss the interplay between Aharonov-Bohm current oscillations, coherent electron trapping and spin blockade under two-electron-spin-resonance configurations. We demonstrate an unexpected antiresonant behavior in the current, allowing for both removal and restoration of maximally entangled spin-blockaded states by tuning the ac field frequency. Our theoretical predictions indicate how to manipulate spin qubits in a triangular quantum dot array.

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页数：4

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