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arXiv 2202.09092cond-mat.quant-gasquant-ph
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含自旋带电粒子的费米气体的量子极限测温

Quantum-limited thermometry of a Fermi gas with a charged spin particle

Lorenzo Oghittu, Antonio Negretti

摘要:

本文研究了离子传感器在测量原子费米气体温度时的灵敏度。我们的研究将M. T. Mitchison等人,Phys. Rev. Lett. 125,080402(2020),其中原子中性杂质用作量子气体的原位温度计。我们发现,原子-离子相互作用的长程特性增强了温度计对某些系统参数的灵敏度。此外,我们研究了离子量子运动态对灵敏度的影响,假设它被限制在一个谐波陷阱。我们观察到,离子的温度灵敏度是显着的影响,其空间扩展,使后者成为一个通用的工具来操纵,以提高温度计的性能。最后,我们讨论我们的研究结果的背景下,目前的实验原子-离子混合物。

英文摘要:

We investigate the sensitivity of an ion sensor in determining the temperature of an atomic Fermi gas. Our study extends to charged impurities the proposal by M. T. Mitchison et al. Phys. Rev. Lett. 125, 080402 (2020), where atomic neutral impurities were used as an in situ thermometer of the quantum gas. We find that the long-range character of the atom-ion interaction enhances the thermometer's sensitivity for certain system parameters. In addition, we investigate the impact of the ion quantum motional state on the sensitivity by assuming that it is confined in a harmonic trap. We observe that the temperature sensitivity of the ion is noticeably influenced by its spatial extension, making the latter a versatile tool to be manipulated for improving the thermometer performance. We finally discuss our findings in the context of current experimental atom-ion mixtures.

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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