论文标题
量化多脉冲量子传感的性能
Quantifying the performance of multi-pulse quantum sensing
论文作者
论文摘要
量子操作的质量决定了量子信息处理的性能，例如量子传感的灵敏度。与量子计算中的量子操作的保真度不同，我们提出了一个有效的功能，可以评估性能并诊断基于多脉冲的量子传感中的操作不完美。评估函数以简单的方式将现实的灵敏度与固有灵敏度联系起来。此外，在此评估函数的指导下，我们优化了一个复合脉冲序列，用于针对光谱不均匀性的高灵敏度基于氮气 - 视障中心的磁力测定法和控制误差，以提高纳米级核磁共振的信噪比，从而提高1个数量级。它标志着在实际应用中使用不完美的量子控制迈向定量量子传感的重要一步。
The quality of a quantum operation determines the performance of quantum information processing, such as the sensitivity of quantum sensing. Different from the fidelity of quantum operation in quantum computation, we present an effective function to evaluate the performance and diagnose the imperfection of operations in multi-pulse based quantum sensing. The evaluation function directly links the realistic sensitivity with intrinsic sensitivity in a simple way. Moreover, guided by this evaluation function, we optimize a composite pulse sequence for high sensitivity nitrogen-vacancycenter based magnetometry against spectrum inhomogeneities and control errors to improve the signal-to-noise ratio of nanoscale nuclear magnetic resonance by 1 order of magnitude. It marks an important step towards quantitative quantum sensing with imperfect quantum control in practical applications.
