论文标题
用超导量子量子的基于耗散的量子传感
Dissipation-based Quantum Sensing of Magnons with a Superconducting Qubit
论文作者
论文摘要
混合量子设备扩展了可用于在各个领域的量子传感的工具和技术。在这里，我们在实验上证明了在铁磁性晶体的磁静态模式下对稳态镁种群的量子感应。将磁静力模式与超导量子置量相结合，允许使用Ramsey干涉测量法以$ 10^{ - 3} $ $ $ \ text {Magnons}/\ sqrt {\ text {\ text {hz}} $以敏感性检测镁质。该协议基于耗散，作为通过磁静态模式下的波动进行驱动，可与磁子数量成比例地降低了量子的相干性。
Hybrid quantum devices expand the tools and techniques available for quantum sensing in various fields. Here, we experimentally demonstrate quantum sensing of the steady-state magnon population in a magnetostatic mode of a ferrimagnetic crystal. Dispersively coupling the magnetostatic mode to a superconducting qubit allows the detection of magnons using Ramsey interferometry with a sensitivity on the order of $10^{-3}$ $\text{magnons}/\sqrt{\text{Hz}}$. The protocol is based on dissipation as dephasing via fluctuations in the magnetostatic mode reduces the qubit coherence proportionally to the number of magnons.
