普适反绝热量子传感
Universal Counterdiabatic Quantum Sensing
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中文总结 AI 辅助
提出在纠缠态制备过程中实现灵敏度的新方法，利用普适反绝热驱动加速绝热制备，并在Lipkin-Meshkov-Glick模型中展示超越标准量子极限的传感灵敏度。
中文摘要 AI 辅助
量子力学的主要应用之一是利用相干性进行极其灵敏的测量。进一步突破这一灵敏度极限的一种方法是预先将系统制备在纠缠态中，尽管这些态的脆弱性限制了其效用。在这项工作中，我们提出了一种新方法，其中灵敏度产生于纠缠态的制备过程中，而非先制备该态再将其用于传感。随后，通过普适反绝热驱动来加速绝热态制备过程，该方法相比标准的绝热捷径对微观参数的不确定性具有更强的鲁棒性。利用一个玩具Lipkin-Meshkov-Glick模型，我们证明该方法还能实现超越标准量子极限的灵敏度。
英文摘要
One of the primary applications of quantum mechanics is leveraging coherence to make incredibly sensitive measurements. One way to push the boundary of this sensitivity even further is to initially prepare a system in an entangled state, though the fragility of these states limits their usefulness. In this work, we propose a new approach by which sensitivity comes during the preparation of an entangled state, rather than first preparing the state and then using it for sensing. An adiabatic state preparation process is then accelerated by universal counterdiabatic driving, which is more robust to uncertainty in microscopic parameters than standard shortcuts to adiabaticity. Using a toy Lipkin-Meshkov-Glick model, we show that this approach can also lead to sensitivity beyond the Standard Quantum Limit.
发表机构
- Boston University（波士顿大学）
机构由 AI 辅助整理，请以论文原文为准。
