论文标题
接近具有内置鲁棒性的Heisenberg-Scalable-Scalable温度计
Approaching Heisenberg-scalable thermometry with built-in robustness against noise
论文作者
论文摘要
量子温度计是一个$ 1/n $缩放的温度计缩放，这是被称为海森伯格缩放的尺度，但迄今为止仍处于起步阶段。主要障碍是通常所需的资源是高度纠缠的状态，这些状态很难产生，并且非常容易发出噪音。在这里，我们提出了一种无纠缠的温度计方案，以接近Heisenberg缩放范围的$ n $，无论相关噪声类型如何，它具有内置的稳健性。我们的方案适合各种实验设置。此外，它可以用作促进先前的温度计提案以达到海森贝格缩放的基本构建块，并且其应用不限于温度法，而是可以直接扩展到其他计量任务。
It is a major goal in quantum thermometry to reach a $1/N$ scaling of thermometric precision known as Heisenberg scaling but is still in its infancy to date. The main obstacle is that the resources typically required are highly entangled states, which are very difficult to produce and extremely vulnerable to noises. Here, we propose an entanglement-free scheme of thermometry to approach Heisenberg scaling for a wide range of $N$, which has built-in robustness irrespective of the type of noise in question. Our scheme is amenable to a variety of experimental setups. Moreover, it can be used as a basic building block for promoting previous proposals of thermometry to reach Heisenberg scaling, and its applications are not limited to thermometry but can be straightforwardly extended to other metrological tasks.
