| 腔耦合量子点系统的非常规几何量子计算 |
| |
| 引用本文： | 张刚,董萍.腔耦合量子点系统的非常规几何量子计算[J].量子电子学报,2009,26(4):431-436. |
| |
| 作者姓名： | 张刚 董萍 |
| |
| 作者单位： | 1 皖西学院数理系， 安徽， 六安 237012;
2 合肥师范学院物理与电子工程系，安徽，合肥，230061 |
| |
| 基金项目： | 国家自然科学基金(60678022;10704001).安徽省教育厅自然科学基金 |
| |
| 摘 要： | 提出了在量子点与腔相互作用系统中，利用双拉曼过程来实现非常规几何量子逻辑门方案。在本方案中，所有的演化本身与腔场态无关，因而对热场是不敏感的。在总位相中既包含有几何位相,又包含有动力学位相,但它的确仅依赖于量子态演化的整体几何特征。通过调节耦合常数和失谐量来选择我们所要的量子控制门，在实际的操作中不需要考虑消除动力学相位问题因而易于操作，且避免因消除动力学相位引入的误差。
|
| 关 键 词： | 几何量子计算 量子点 拉曼过程 |
| 收稿时间： | 2009/4/23 |
| 修稿时间： | 2009-05-11 |
Unconventional geometric quantum computation with quantum-dot spin qubits inside a cavity |
| |
| ZHANG Gang,DONG Ping.Unconventional geometric quantum computation with quantum-dot spin qubits inside a cavity[J].Chinese Journal of Quantum Electronics,2009,26(4):431-436. |
| |
| Authors: | ZHANG Gang DONG Ping |
| |
| Affiliation: | 1Department of Physics and Mathematics, West Anhui,Uiversity, Lu'an , 237012, China;
2 Department of Physics, Hefei teacher college, Hefei,230061, China |
| |
| Abstract: | A scheme for realizing unconventional geometric quantum logical gates with quantum dots in a microcavity, via double channel Raman interactions, is introduced. In the scheme, all of the operations are independent on the state of cavity mode, and thus insensitive to the thermal cavity field states. The total accumulated phase includes both geometric and dynamic phases, but it still depends only on global features of the process. The required quantum gates can be obtained by adjusting coupling constant and detunings. It’s relatively easy in implementation by waiving the needs of eliminating dynamic phases, and it can reach higher fidelity by avoiding the additional errors in the process of eliminating dynamic phases. |
| |
| Keywords: | quantum optics geometric quantum computation quantum dot Raman interaction |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《量子电子学报》浏览原始摘要信息 |
|
点击此处可从《量子电子学报》下载全文 |
|
