论文标题
钻石自旋的最佳量子光控制
Optimal quantum optical control of spin in diamond
论文作者
论文摘要
氮散布（NV）中心旋转代表了量子信息处理的有吸引力的候选者。除了使用广泛使用的微波控制外，还可以使用激发能量水平介导的激光来实现其相干操纵。然而，NV中心自旋的激发状态的多个级别使连贯的过渡过程变得复杂，并可能影响相干操纵的保真度。在这里，我们采用了最佳量子控制的策略，以使用激光在NV中心旋转的基态歧管中加速相干状态转移。结果表明，连贯状态转移的速度和保真度都提高了性能，这对于钻石中NV中心自旋的光学控制非常有用。
The nitrogen-vacancy (NV) center spin represents an appealing candidate for quantum information processing. Besides the widely used microwave control, its coherent manipulation may also be achieved using laser as mediated by the excited energy levels. Nevertheless, the multiple levels of the excited state of NV center spin make the coherent transition process become complex and may affect the fidelity of coherent manipulation. Here, we adopt the strategy of optimal quantum control to accelerate coherent state transfer in the ground state manifold of NV center spin using laser. The results demonstrate improved performance in both the speed and the fidelity of coherent state transfer which will be useful for optical control of NV center spin in diamond.
