论文标题
带电自旋颗粒的费米气体的量子限制温度计
Quantum-limited thermometry of a Fermi gas with a charged spin particle
论文作者
论文摘要
我们研究了离子传感器在确定原子费米气体温度时的灵敏度。我们的研究扩展到了M. T. Mitchison等人的提案。物理。莱特牧师。 125，080402（2020），其中原子中性杂质用作量子气的原位温度计。我们发现，原子-ON相互作用的远程特征增强了温度计对某些系统参数的敏感性。此外，我们通过假设将其限制在谐波陷阱中来研究离子量子运动状态对灵敏度的影响。我们观察到，离子的温度灵敏度明显受到其空间延伸的影响，这使得后者是一种多功能工具，以改善温度计性能。我们最终在当前的实验原子混合物的背景下讨论了我们的发现。
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.
