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arXiv 1709.09387quant-ph
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具有强相互作用探针系统的鲁棒量子传感

Robust quantum sensing with strongly interacting probe systems

Shane Dooley, Michael Hanks, Shojun Nakayama, William J. Munro, Kae Nemoto

摘要:

在量子精密测量和感测领域中,量子系统(例如自旋)的集合被用作探针以估计某个物理参数(例如磁场)。通常假设探针系统之间没有相互作用。我们发现,它们之间的强相互作用可以增加对热噪声的鲁棒性,从而提高灵敏度。原则上,如果存在长程相互作用,即使在非零温度下,灵敏度也可以按探针数量呈指数级缩放。该方案也可以与其他技术相结合,如动态解耦,以提高灵敏度在现实的实验。

英文摘要:

In the field of quantum metrology and sensing, a collection of quantum systems (e.g. spins) are used as a probe to estimate some physical parameter (e.g. magnetic field). It is usually assumed that there are no interactions between the probe systems. We show that strong interactions between them can increase robustness against thermal noise, leading to enhanced sensitivity. In principle, the sensitivity can scale exponentially in the number of probes -- even at non-zero temperatures -- if there are long-range interactions. This scheme can also be combined with other techniques, such as dynamical decoupling, to give enhanced sensitivity in realistic experiments.

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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