标题： 量化多脉冲量子传感的性能 显示英文标题

标题： Quantifying the performance of multi-pulse quantum sensing

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。 与量子计算中量子操作保真度不同，我们提出了一种有效函数来评估多脉冲量子传感中操作的性能并诊断操作的不完善之处。 该评估函数以简单的方式直接将实际灵敏度与固有灵敏度联系起来。 此外，通过该评估函数的指导，我们优化了一个复合脉冲序列，以提高基于氮空位中心的磁强计在光谱非均匀性和控制误差下的灵敏度，从而将纳米尺度核磁共振的信噪比提高了1个数量级。 这标志着在实际应用中使用不完善的量子控制实现定量量子传感迈出了重要的一步。 显示英文摘要

摘要： 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.