论文标题
大型转移时钟原子干涉仪的实际限制
Practical limits for large-momentum-transfer clock atom interferometers
论文作者
论文摘要
在陆上和未来的空间任务中，正在为许多长基线实验进行光学时钟过渡的原子干涉法。对于满足这些实验所需的敏感性至关重要的是实施大动量转移（$> $ 10 $^3 \ hbar k $）。在这里，我们表明，要通过$π$脉冲顺序应用如此巨大的动量，对干涉测量激光的频率噪声提出了严格的要求，发现线宽必须比以前建议的要低得多。这是由于在存在噪声的情况下不完善的脉搏保真度，即使对于与谐振光相互作用的原子，也很明显，这使得对给定激光器和脉冲序列的操作保真度成为基本限制。在此框架内，我们进一步介绍并分析了两个高功率，频率稳定的激光源，旨在对$^1 $ s $ _0 $ _0 $ - $^3 $ p $ _0 $ _0 $ _0 $ _0 $ _0 $ _0 $ _0 $时钟过渡，分别在332 nmm和698 nm和698 nm中运行。
Atom interferometry on optical clock transitions is being pursued for numerous long-baseline experiments both terrestrially and for future space missions. Crucial to meeting these experiments' required sensitivities is the implementation of large momentum transfer ($>$10$^3\hbar k$). Here we show that to sequentially apply such a large momentum via $π$ pulses places stringent requirements on the frequency noise of the interferometry laser, finding that the linewidth is required to be considerably lower than has previously been suggested. This is due to imperfect pulse fidelity in the presence of noise and is apparent even for an atom at rest interacting with resonant light, making this a fundamental constraint on operational fidelity for a given laser and pulse sequence. Within this framework, we further present and analyse two high-power, frequency-stabilised laser sources designed to perform interferometry on the $^1$S$_0$ - $^3$P$_0$ clock transitions of cadmium and strontium, respectively operating at 332 nm and 698 nm.
