论文标题
通过反对称狂犬病光谱法强大的相互作用增强感测
Robust Interaction-Enhanced Sensing via Antisymmetric Rabi Spectroscopy
论文作者
论文摘要
原子光谱是用于频率估计的必不可少的工具，广泛用于量子传感中。原子 - 原子相互作用可用于生成纠缠以实现量子增强的感应。但是，原子 - 原子相互作用始终诱导碰撞变化，这在确定共振频率时会带来系统的错误。使用原子 - 原子相互作用与抑制碰撞转移之间的矛盾通常存在于原子光谱中。在这里，我们提出了一种抗对称的狂犬病光谱方案，而没有碰撞在原子 - 原子相互作用的情况下。我们在分析上发现，抗对称点可用于确定共振频率。对于小的狂犬病频率，与传统的狂犬病光谱法相比，我们具有轻微原子 - 原子相互作用的反对称性狂犬光谱可以提供更好的测量精度。使用更强的原子 - 原子相互作用和RABI频率，频谱分辨率可以大大改善，并且测量精度甚至可以超过标准的量子极限。此外，与通过自旋挤压的量子增强的Ramsey干涉法不同，我们的方案可抵抗检测噪声。我们的反对称狂犬病光谱方案在各种实用量子传感器（例如原子钟和原子磁力计）中具有有希望的应用。
Atomic spectroscopy, an essential tool for frequency estimation, is widely used in quantum sensing. Atom-atom interaction can be used to generate entanglement for achieving quantum enhanced sensing. However, atom-atom interaction always induces collision shift, which brings systematic error in determining the resonance frequency. Contradiction between utilizing atom-atom interaction and suppressing collision shift generally exists in atomic spectroscopy. Here, we propose an antisymmetric Rabi spectroscopy protocol without collision shift in the presence of atom-atom interactions. We analytically find that the antisymmetric point can be used for determining the resonance frequency. For small Rabi frequency, our antisymmetric Rabi spectroscopy with slight atom-atom interaction can provide better measurement precision than the conventional Rabi spectroscopy. With stronger atom-atom interaction and Rabi frequency, the spectrum resolution can be dramatically improved and the measurement precision may even beat the standard quantum limit. Moreover, unlike the quantum-enhanced Ramsey interferometry via spin squeezing, our scheme is robust against detection noises. Our antisymmetric Rabi spectroscopy protocol has promising applications in various practical quantum sensors such as atomic clocks and atomic magnetometers.
