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在无核旋转的瓦纳迪尔立方体中长的连贯时间
Chung-Jui Yu1, Michael J Graham1, Joseph M Zadrozny1
1Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|November 1, 2016
概括
研究人员开发了用于量子信息处理 (QIP) 的新型瓦纳基复合体. 这些分子量子比特具有较长的自旋放松时间 (T1) 和具有竞争力的连贯时间 (T2),进步了QIP材料设计.
科学领域:
- 量子信息科学
- 分子量子计算
- 量子技术的材料科学
背景情况:
- 量子信息处理 (QIP) 需要具有较长连贯时间 (T2) 和自旋放松时间 (T1) 的强大的量子比特.
- 基于的复合物已经被证明是有前途的分子量子位,之前的工作在tris (dithiolene) 复合物中实现了毫秒T2次.
- 整合长T2与表面兼容性对于实际的QIP应用至关重要.
研究的目的:
- 作为潜在的分子量子位,研究瓦纳基复合物,将表面兼容性与长时间的连贯性结合起来.
- 探索连接体设计和溶解物-溶剂相互作用对量子位性能 (T1和T2) 的影响.
- 建立新的设计原则来增强分子量子比特中的T1和T2.
主要方法:
- 四种新型瓦纳基复合物的合成和表征: (Ph4P) 2[VO(C8S8) 2 (1), (Ph4P) 2[VO(β-C3S5) 2 (2), (Ph4P) 2[VO(α-C3S5) 2 (3),和 (Ph4P) 2[VO(C3S4O) 2 (4).
- 使用脉冲电子磁共振 (EPR) 光谱测量T1和T2值.
- 在SO2溶剂中比较复合物的性能与先前报告的三 (二甲基) 复合物.
主要成果:
- 在SO2中的瓦纳基复合物1-4呈现T2值高达152 ((6) μs,与领先的分子量子位候选物相美.
- 与三乙烯相比,乙烯的T1显著增加,这是由于溶剂与溶剂的相互作用增强.
- 发现瓦纳基复合物的T2略有下降,这归因于由于配体修饰而减少了对溶剂核旋转的屏蔽.
结论:
- 瓦纳迪尔复合体代表了分子量子位的有希望的候选者,由于强烈的溶液-溶剂相互作用,它们提供了长时间的T1.
- 连接体设计在调整T1和T2中起着至关重要的作用,平衡溶解物-溶剂相互作用与屏蔽效应.
- 这些发现为设计下一代分子量子比特提供了宝贵的见解,
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