论文标题
通过动态解耦来保持多级量子相干性
Preserving multi-level quantum coherence by dynamical decoupling
论文作者
论文摘要
与两级系统相比，使用多层系统（QUDITS）使用多级系统（QUDITS）处理的量子信息处理提供了其他功能和应用程序。但是，从未在实验中证明Qudits更容易脱离Qudits，并且Qudits的动态解耦。在这里，作为原则证明，我们在实验上应用动力学去耦来保护三个级别的叠加$^9 \ rm {be}^+$ ion的叠加，从环境噪声磁场中，将连贯性延长至大约一个数量级。我们的演示直接可扩展到更高的级别，可能会为长时间连贯的量子记忆，计量和信息处理而开辟一条途径。
Quantum information processing with multi-level systems (qudits) provides additional features and applications than the two-level systems. However, qudits are more prone to dephasing and dynamical decoupling for qudits has never been experimentally demonstrated. Here, as a proof-of-principle demonstration, we experimentally apply dynamical decoupling to protect superpositions with three levels of a trapped $^9\rm{Be}^+$ ion from ambient noisy magnetic field, prolonging coherence by up to approximately an order of magnitude. Our demonstration, straightforwardly scalable to more levels, may open up a path toward long coherence quantum memory, metrology and information processing with qudits.
