论文标题
通过非平衡泵场增强耗散猫状态的生成
Enhancing dissipative cat-state generation via nonequilibrium pump fields
论文作者
论文摘要
最初提议表现出宏观叠加的猫州在量子动力学的基本方面起着出色的作用。此外，它们在量子计算和量子传感中还具有潜在的应用。但是，猫州很容易受到耗散的影响，这使猫态生成的重点更高速度和稳健性。耗散猫态生成是一种基于有损泵场和半频信号场之间的非线性耦合的常见方法。在这种方法中，泵场通常保持在平衡状态，从而限制了猫态的生成。我们表明，可以通过利用同步泵法来消除平衡要求。在这种非平衡状态下，猫态生成的速度可以通过一个数量级提高，并且可以提高单光子损失的稳健性。讨论了有关时间多形的系统和站立模式的同步泵的实现。
Cat states, which were initially proposed to manifest macroscopic superpositions, play an outstanding role in fundamental aspects of quantum dynamics. In addition, they have potential applications in quantum computation and quantum sensing. However, cat states are vulnerable to dissipation, which puts the focus of cat-state generation on higher speed and increased robustness. Dissipative cat-state generation is a common approach based on the nonlinear coupling between a lossy pump field and a half-frequency signal field. In such an approach, the pump field is usually kept in equilibrium, which limits the cat-state generation. We show that the equilibrium requirement can be removed by leveraging a synchronous pump method. In this nonequilibrium regime, the speed of the cat-state generation can be increased by one order of magnitude, and the robustness to single-photon loss can be enhanced. The realization of synchronous pumps is discussed for both time-multiplexed systems and standing modes.
