论文标题
通过相互作用诱导的氮气空位中心中的冻结在钻石中解耦核自旋
Decoupling Nuclear Spins via Interaction-Induced Freezing in Nitrogen Vacancy Centers in Diamond
论文作者
论文摘要
钻石中的氮散布（NV）中心为各种新兴量子技术提供了一个室温平台，例如长长的核自旋连贯性时间作为潜在的量子记忆登记处。我们为NV中心展示了一种冻结协议，以将其内在的核自旋与嘈杂的电磁环境分离。当高精细偶联电子和核自旋同时以不平等的狂犬病频率同时驱动核自旋的任何初始状态。通过数值模拟，我们表明我们的协议可以有效地保护核自旋免受强驱动或噪声场的影响。我们还通过测量电子核自旋系统的量子不一致来观察到对冷冻核自旋状态中量子相关性的明显抑制。这些特征可以有助于延长杂交量子系统中基于NV核旋转的量子记忆的存储时间。
Nitrogen-Vacancy (NV) centers in diamonds provide a room-temperature platform for various emerging quantum technologies, e.g. the long nuclear spin coherence times as potential quantum memory registers. We demonstrate a freezing protocol for an NV center to isolate its intrinsic nuclear spin from a noisy electromagnetic environment. Any initial state of the nuclear spin can be frozen when the hyperfine-coupled electron and nuclear spins are simultaneously driven with unequal Rabi frequencies. Through numerical simulations, we show that our protocol can effectively shield the nuclear spin from strong drive or noise fields. We also observe a clear suppression of quantum correlations in the frozen nuclear spin regime by measuring the quantum discord of the electron-nuclear spin system. These features can be instrumental in extending the storage times of NV nuclear-spin based quantum memories in hybrid quantum systems.
