标题： 电子自旋和核自旋之间的相干态传递在15N@C60中 显示英文标题

标题： Coherent state transfer between an electron- and nuclear spin in 15N@C60

摘要： 电子自旋量子比特在分子系统中具有高可重复性，并能够自组装成更大的结构。 然而，相邻量子比特之间的相互作用是“始终开启”的，尽管电子自旋的相干时间可以达到几百微秒，但这些时间仍然比典型核自旋的时间短得多。 在此，我们实现了一个电子-核混合方案，利用电子和核自旋自由度之间的相干传递，以可控地开启/关闭相邻自旋之间的二极相互作用，并受益于长核自旋退相干时间（T2n）。 我们使用一系列调谐的微波和射频脉冲，在15N@C60中的电子和15N核自旋之间以双向过程保真度为88%转移量子比特状态，并测量到核自旋相干寿命超过100毫秒。 显示英文摘要

摘要： Electron spin qubits in molecular systems offer high reproducibility and the ability to self assemble into larger architectures. However, interactions between neighbouring qubits are 'always-on' and although the electron spin coherence times can be several hundred microseconds, these are still much shorter than typical times for nuclear spins. Here we implement an electron-nuclear hybrid scheme which uses coherent transfer between electron and nuclear spin degrees of freedom in order to both controllably turn on/off dipolar interactions between neighbouring spins and benefit from the long nuclear spin decoherence times (T2n). We transfer qubit states between the electron and 15N nuclear spin in 15N@C60 with a two-way process fidelity of 88%, using a series of tuned microwave and radiofrequency pulses and measure a nuclear spin coherence lifetime of over 100 ms.