Manipulation of two spin qubits in a double quantum dot using an electric field

被引：7
|
作者：
Shitade, Atsuo [1 ]
Ezawa, Motohiko [1 ]
Nagaosa, Naoto [1 ,2 ,3 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] RIKEN ASI, Cross Correlated Mat Res Grp CMRG, Wako, Saitama 3510198, Japan
[3] RIKEN ASI, CERG, Wako, Saitama 3510198, Japan
来源：
PHYSICAL REVIEW B | 2010年 / 82卷 / 19期
基金：
日本科学技术振兴机构;
关键词：
WEAK FERROMAGNETISM; COMPUTATION; GATES;
D O I：
10.1103/PhysRevB.82.195305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We propose purely electric manipulation of spin qubits by means of the spin-orbit interaction (SOI) without magnetic field or magnets in a double quantum dot. All the unitary transformations can be constructed by the time-dependent Dzyaloshinsky-Moriya interaction between the two spins, which arises from the Rashba SOI modulated by electric field. As a few demonstrations, we study both analytically and numerically the three operations, i.e., (A) the spin initialization, (B) the two-spin rotation in the opposite directions, and (C) the two-spin rotation in the same direction. The effects of the relaxation and the feasibility of this proposal are also discussed.
引用
收藏
页数：6
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