论文标题
使用可调超导码头的量子传感：优化和加速
Quantum sensing with tunable superconducting qubits: optimization and speed-up
论文作者
论文摘要
传感和计量学通过满足对更精确的数据集的需求，并允许研究人员对理论模型的有效性得出更可靠的结论，从而在基本科学和应用中发挥重要作用。传感器无处不在。它们用于各种领域的应用中，包括重力成像，地质，导航，安全性，计时，光谱，化学，磁法，医疗保健和医学。量子技术的当前进展不可避免地触发了使用量子系统作为具有新功能的传感器的探索。本文介绍了基于具有可调的透射量子台的传感器，用Kitaev相估计算法优化了外部磁通量的量子增强感应。它为具有不同最大值位转变频率的传感器提供了最佳的通量偏置点。为给定设计估算了破坏率的估计。将$ 2- $和$ 3- $ QUBIT纠缠状态的使用与单量子盒进行比较。通量感应精度达到$ 10^{ - 8} \cdotφ_0$，并随时间缩放为$ \ sim \ 1/t $，这证明了具有高度最终精度的传感加速。
Sensing and metrology play an important role in fundamental science and applications by fulfilling the ever-present need for more precise data sets and by allowing researchers to make more reliable conclusions on the validity of theoretical models. Sensors are ubiquitous. They are used in applications across a diverse range of fields including gravity imaging, geology, navigation, security, timekeeping, spectroscopy, chemistry, magnetometry, healthcare, and medicine. Current progress in quantum technologies has inevitably triggered the exploration of the use of quantum systems as sensors with new and improved capabilities. This article describes the optimization of the quantum-enhanced sensing of external magnetic fluxes with a Kitaev phase estimation algorithm based on a sensor with tunable transmon qubits. It provides the optimal flux biasing point for sensors with different maximal qubit transition frequencies. An estimation of decoherence rates is made for a given design. The use of $2-$ and $3-$qubit entangled states for sensing are compared in simulation with the single qubit case. The flux sensing accuracy reaches $10^{-8}\cdotΦ_0$ and scales with time as $\sim\ 1/t$ which proves the speed-up of sensing with high ultimate accuracy.
