论文标题
部分可观测时空混沌系统的无模型预测
Variance-Based Sensitivity Analysis of $Λ$-type Quantum Memory
论文作者
论文摘要
光子量子状态的存储和检索，量子记忆是广泛量子应用的关键资源。在这里，我们研究了$λ$ -Type量子记忆对实验波动和漂移的敏感性。我们使用基于方差的方法，重点关注波动的影响和漂移对记忆效率的影响。我们考虑内存参数的射击波动，并单独考虑控制场参数的更长时间尺度漂移。我们发现量子内存最敏感的参数依赖于所使用的量子存储协议，而观察到的灵敏度与协议的物理解释一致。我们还提供了一个通用框架，适用于超出记忆效率的其他功绩数字。这些结果对量子记忆实验具有实际分析。
The storage and retrieval of photonic quantum states, quantum memory, is a key resource for a wide range of quantum applications. Here we investigate the sensitivity of $Λ$-type quantum memory to experimental fluctuations and drift. We use a variance-based approach, focusing on the effects of fluctuations and drift on memory efficiency. We consider shot-to-shot fluctuations of the memory parameters, and separately we consider longer timescale drift of the control field parameters. We find the parameters that a quantum memory is most sensitive to depend on the quantum memory protocol being employed, where the observed sensitivity agrees with physical interpretation of the protocols. We also present a general framework that is applicable to other figures of merit beyond memory efficiency. These results have practical ramifications for quantum memory experiments.
