论文标题
使用嘈杂相移的叠加的转向增强量子计量
Steering-enhanced quantum metrology using superpositions of noisy phase shifts
论文作者
论文摘要
量子转向是量子信息理论中的重要相关性。最近的工作[Nat。社区。 12，2410（2021）]表明量子转向也可用于量子计量学。在这里，我们将转向增强的量子计量学的探索从单个无噪声相移到嘈杂相移的叠加。作为具体的示例，我们考虑了一个控制系统，该控制系统操纵目标系统以通过脱离或去极化相移通道的叠加。我们表明，使用这种嘈杂相移的叠加可以抑制噪声的影响并改善计量。此外，我们还实施了原则实验，以叠加基于IBM量子体验的相位偏移，证明了计量学的明显改进。
Quantum steering is an important correlation in quantum information theory. A recent work [Nat. Commun. 12, 2410 (2021)] showed that quantum steering is also useful for quantum metrology. Here, we extend the exploration of steering-enhanced quantum metrology from single noiseless phase shifts to superpositions of noisy phase shifts. As concrete examples, we consider a control system that manipulates a target system to pass through a superposition of either dephased or depolarized phase shifts channels. We show that using such superpositions of noisy phase shifts can suppress the effects of noise and improve metrology. Furthermore, we also implemented proof-of-principle experiments for a superposition of dephased phase shifts on the IBM Quantum Experience, demonstrating a clear improvement on metrology.
