Counter-diabatic driving for fast spin control in a two-electron double quantum dot

被引：15

作者：

Ban, Yue ^{[1
]}

Chen, Xi ^{[2
]}

机构：

[1] Shanghai Univ, Dept Elect Informat Mat, Shanghai 200444, Peoples R China

[2] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China

来源：

SCIENTIFIC REPORTS | 2014年 / 4卷

关键词：

SINGLE-ELECTRON SPIN;

D O I：

10.1038/srep06258

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The techniques of shortcuts to adiabaticity have been proposed to accelerate the "slow'' adiabatic processes in various quantum systems with the applications in quantum information processing. In this paper, we study the counter-diabatic driving for fast adiabatic spin manipulation in a two-electron double quantum dot by designing time-dependent electric fields in the presence of spin-orbit coupling. To simplify implementation and find an alternative shortcut, we further transform the Hamiltonian in term of Lie algebra, which allows one to use a single Cartesian component of electric fields. In addition, the relation between energy and time is quantified to show the lower bound for the operation time when the maximum amplitude of electric fields is given. Finally, the fidelity is discussed with respect to noise and systematic errors, which demonstrates that the decoherence effect induced by stochastic environment can be avoided in speeded-up adiabatic control.

引用

页数：5

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