论文标题
空间Bloch振荡原子干涉仪的灵敏度界限
Sensitivity bounds of a spatial Bloch-oscillations Atom Interferometer
论文作者
论文摘要
我们研究了Bloch振荡原子干涉仪的敏感性的最终界限，其中从现场原子密度的测量中估算了外力。对于外部力量使晶格位点之间的能量差异小于隧道能量，原子波功能扩散在许多晶格位点上，增加了晶格的占用模式之间的分离并自然增强了干涉仪的敏感性。为了研究该方案的适用性，我们估计了隧道能量不受控制的波动的影响以及原子检测的有限分辨率。我们的分析表明，水平晶格与弱外力相结合，可以产生高灵敏度。因此，该设置是用于紧凑设备或具有高空间分辨率的测量值的有前途的解决方案。
We study the ultimate bounds on the sensitivity of a Bloch-oscillation atom interferometer where the external force is estimated from the measurement of the on-site atomic density. For external forces such that the energy difference between lattice sites is smaller than the tunneling energy, the atomic wave-function spreads over many lattice sites, increasing the separation between the occupied modes of the lattice and naturally enhancing the sensitivity of the interferometer. To investigate the applicability of this scheme we estimate the effect of uncontrolled fluctuations of the tunneling energy and the finite resolution of the atom detection. Our analysis shows that a horizontal lattice combined with a weak external force allow for high sensitivities. Therefore, this setup is a promising solution for compact devices or for measurements with high spatial resolution.
