Adiabatic steering and determination of dephasing rates in double-dot qubits

被引:37
作者
Brandes, T
Renzoni, F
Blick, RH
机构
[1] Univ Manchester, Inst Sci & Technol, Dept Phys, Manchester M60 1QD, Lancs, England
[2] Ecole Normale Super, Dept Phys, Lab Kastler Brossel, F-75231 Paris 05, France
[3] Univ Munich, Ctr Nanosci, D-80539 Munich, Germany
[4] Univ Munich, Sekt Phys, D-80539 Munich, Germany
来源
PHYSICAL REVIEW B | 2001年 / 64卷 / 03期
关键词
D O I
10.1103/PhysRevB.64.035319
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We propose a scheme to prepare arbitrary superpositions of quantum states in double quantum dots irradiated by coherent microwave pulses. Solving the equations of motion for the dot-density matrix, we find that dephasing rates for such superpositions can be quantitatively inferred from additional electron-current pulses that appear due to a controllable breakdown of coherent population trapping in the dots.
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页数:5
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