论文标题
使用广义多组分Schrodinger Cat状态的最佳量子相估计
Optimal quantum phase estimation with generalized multi-component Schrodinger cat states
论文作者
论文摘要
在本文中，我们有兴趣检测附近的相位敏感物体的存在，在低光子损耗率下，行进灯在该物体下工作。在这里，我们使用广义的多组分Schrodinger CAT状态研究了最佳量子相估计。此外，我们在无损场景中显示了广义多组分CAT状态的最佳条件。然后，我们证明，在存在较小的损失的情况下，普遍的多组分猫状态可以击败中午和两种模式的真空状态，同时保持相干状态可实现的量子优势。最后，我们提出了具有当前或近期光学技术的纠缠多组分CAT状态的生成方案。
In this paper, we are interested in detecting the presence of a nearby phase-sensitive object, where traveling light works out under a low-photon loss rate. Here we investigate the optimal quantum phase estimation with generalized multi-component Schrodinger cat states. In addition, we show the optimal conditions of the generalized multi-component cat states for the phase estimation in a lossless scenario. We then demonstrate that the generalized multi-component cat states can beat the performances of the NOON and two-mode squeezed vacuum states in the presence of small loss, while maintaining the quantum advantage over the standard quantum limit, attainable by coherent states. Finally, we propose a generation scheme of the entangled multi-component cat states with current or near-term optical technologies.
