All-electric qubit control in heavy hole quantum dots via non-Abelian geometric phases
All-electric qubit control in heavy hole quantum dots via non-Abelian geometric phases
复制标题
通过非阿贝尔几何相对重空穴量子点进行全电量子位控制
DOI：
10.1103/physrevb.85.205425
复制
发表时间：
2012
影响因子：
3.7
通讯作者：
B. Trauzettel
中科院分区：
文献类型：
--
作者：
J. C. Budich;D. G. Rothe;E. Hankiewicz;B. Trauzettel
我们展示了如何非阿贝尔几何相位可以用来普遍处理一个自旋量子比特在重空穴量子点在没有磁场。一个依赖于时间的电四极场被用来执行任何所需的单量子比特操作凭借非阿贝尔holonomy。在所提出的操作期间，表示量子比特的时间相关的两能级系统的简并不分裂。由于时间反演对称性被保留，并且已知超精细耦合在基于重空穴的自旋量子比特中很弱，因此我们预计在所提出的设置中会有很长的相干时间。
We demonstrate how non-Abelian geometric phases can be used to universally process a spin qubit in heavy hole quantum dots in the absence of magnetic fields. A time dependent electric quadrupole field is used to perform any desired single qubit operation by virtue of non-Abelian holonomy. During the proposed operations, the degeneracy of the time dependent two level system representing the qubit is not split. Since time reversal symmetry is preserved and hyperfine coupling is known to be weak in spin qubits based on heavy holes, we expect very long coherence times in the proposed setup.