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arXiv 2005.09250quant-phcond-mat.mes-hall
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超导量子比特磁振子耗散量子传感

Dissipation-based Quantum Sensing of Magnons with a Superconducting Qubit

Samuel Piotr Wolski, Dany Lachance-Quirion, Yutaka Tabuchi, Shingo Kono, Atsushi Noguchi, Koji Usami, Yasunobu Nakamura

摘要:

混合量子器件扩展了各种领域中可用于量子传感的工具和技术。在这里,我们实验证明量子传感的稳态磁振子人口的静磁模式的亚铁磁晶体。将静磁模式色散耦合到超导量子位允许使用具有大约$10^{-3}$ $\text{magnons}/\sqrt{\text{Hz}}$的灵敏度的拉姆齐干涉法来检测磁振子。该协议基于耗散,因为经由静磁模式中的波动的移相与磁振子的数量成比例地降低了量子比特相干性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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