论文标题
基于耗散稳定的氮散布中心的选择性核旋转相互作用
Selective nuclear-spin interaction based on a dissipatively stabilized nitrogen-vacancy center
论文作者
论文摘要
当前实现核核量子门的典型方法需要通过使用动力学去耦技术来进行一系列电子核量子门，由于在室温下NV旋转的短温度和松弛时间，该方法在低温下实现。可以通过将NV自旋的定期重置作为两个核自旋之间相互作用的介体[Chen，Schwarz和Plenio，119，1119，010801（2017）]来克服这种限制。但是，此方法在严格的耦合强度条件下起作用，这使其不适用于异核量子门操作。在这里，我们通过使用射频（RF）场来控制不同的核自旋物质。 NV中心的定期重置保护核自旋免受NV旋转的腐蚀和松弛。 RF控制提供了在异核旋转之间具有高选择性和高富度量子门的概率，并通过在环境条件下使用核自旋传感器来检测核自旋。
Current typical methods to realize nuclear-nuclear quantum gates require a sequence of electronnuclear quantum gates by using dynamical decoupling techniques, which are implemented at low temperature because of short decoherence and relaxation time of the NV spin at room temperature. This limitation could be overcome by using periodical resets of an NV spin as a mediator of interaction between two nuclear spins [Chen, Schwarz, and Plenio, 119, 010801 (2017)]. However, this method works under stringent coupling strengths condition, which makes it not applicable to heteronuclear quantum gate operations. Here we develop this scheme by using radio-frequency (RF) fields to control different nuclear spin species. Periodical resets of the NV center protect the nuclear spins from decoherence and relaxation of the NV spin. RF control provides probability to have highly selective and high fidelity quantum gates between heteronuclear spins as well as detecting nuclear spins by using a nuclear spin sensor under ambient conditions.
