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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