论文标题
在室温下在不对称耦合的三个NV中心中实现高度纠缠的状态
Realizing highly entangled states in asymmetrically coupled three NV centers at room temperature
论文作者
论文摘要
尽管做出了许多努力，但随机安排的多NV中心与谐振器之间的耦合尚未得到显着改善，这主要是由于我们对它们的纠缠时间有限的了解（2T_ENT）。在这里，我们通过使用基于2T_ENT的IBM量子模拟器上的新量子（U_C）门的模拟三元电子 - 电子共振实验来证明三-NV中心之间的非常强的耦合，该实验是2T_ENT 〜12.5微秒安装的，是三角形的配置。有趣的是，通过打破耦合的对称性，可以实现甚至较低的2t_ent〜6.3μs。该模拟不仅解释了最近观察到的三个NV中心的发光光谱[Haruyama，Nat。社区。 [2019]但还显示了通过循环重新分布耦合的人为创建结构中纠缠的很大改善。 NV中心的现实无序耦合构型具有短的时间，并且状态较高（0.89-0.99）的忠诚度清楚地表明，在室温下运行的准确量子寄存器的可能性清楚。
Despite numerous efforts the coupling between randomly arranged multi-NV centers and also resonators has not been improved significantly mainly due to our limited knowledge of their entanglement times (2t_ent). Here, we demonstrate a very strong coupling between three-NV centers by using a simulated triple electron-electron resonance experiment based on a new quantum (U_C) gate on IBM quantum simulator with 2t_ent ~12.5 microsecond arranged is a triangular configuration. Interestingly through breaking the symmetry of couplings an even lower 2t_ent ~6.3 μs can be achieved. This simulation not only explains the luminescence spectra in recently observed three-NV centers [Haruyama, Nat. Commun. 2019] but also shows a large improvement of the entanglement in artificially created structures through a cyclic redistribution of couplings. Realistically disordered coupling configurations of NV centers qubits with short time periods and high (0.89-0.99) fidelity of states clearly demonstrate possibility of accurate quantum registers operated at room temperature.
