测量原子镜相干性损失的原子干涉仪

Realization of a Rydberg-dressed Ramsey interferometer and electrometer

We present the experimental realization and characterization of a Ramsey interferometer based on optically trapped ultracold potassium atoms, where one state is continuously coupled by an off-resonant laser field to a highly-excited Rydberg state. We show that the observed interference signals can be used to precisely measure the Rydberg atom-light coupling strength as well as the population and coherence decay rates of the Rydberg-dressed states with sub-kilohertz accuracy and for Rydberg state fractions as small as one part in $10^{6}$. We also demonstrate an application for measuring small,…

通过动态镜面补偿恢复大面积双原子干涉仪陀螺仪的速度免疫性

Restoring Velocity Immunity via Dynamic Mirror Compensation in a Large-Area Dual-Atom-Interferometer Gyroscope

提出并演示了一种动态镜面补偿方案，通过主动旋转拉曼镜面消除科里奥利效应破坏的速度免疫性，在21.1 cm²干涉面积的双原子干涉仪陀螺仪上实现40倍速度依赖性降低和0.13 ppm的标度因子稳定性。

非简并源囚禁原子干涉仪中的碰撞退相干

Collisional decoherence in trapped atom interferometers that use non-degenerate sources

使用非简并气体的捕获原子干涉仪的相干时间和灵敏度受到原子之间碰撞的限制。建立了一个描述干涉仪中原子间碰撞效应的解析模型。然后将其应用于使用谐波捕获的非简并原子气体的干涉仪，该气体用单组驻波激光脉冲操纵。该模型用于寻找干涉仪的最佳工作条件，并使用干涉仪的直接蒙特卡罗模拟来验证解析模型。

Multi-pass guided atomic Sagnac interferometer for high-performance rotation sensing

Matter-wave interferometry with atoms propagating in a guiding potential is expected to provide compact, scalable and precise inertial sensing. However, a rotation sensing device based on the Sagnac effect with atoms guided in a ring has not yet been implemented despite continuous efforts during the last two decades. Here we discuss some intrinsic effects that limit the coherence in such a device and propose a scheme that overcomes these limitations and enables a multi-pass guiding Sagnac interferometer with a Bose-Einstein condensate (BEC) on a chip in a ring potential. We analyze crucial dep…

在有限响应时间内优化镜像脉冲的切片相位控制用于冷原子干涉仪

Optimized Slice-Phase Control of Mirror Pulse in Cold-Atom Interferometry with Finite Response Time

本研究通过自适应切片结构和量子最优控制方法，优化冷原子干涉仪的镜像脉冲，提升其在非均匀环境下的鲁棒性和效率。

实现空间关联晶格干涉仪

Realizing a spatially correlated lattice interferometer

本研究实现了由运动光学晶格修饰的相干物质波Ramsey-Bordé干涉仪，探究了多路径可调相干干涉及原子空间关联，观测到玻色-爱因斯坦凝聚体长程相干性带来的多干涉峰，结果与理论一致，为超冷原子高精度干涉测量奠定基础。

Why momentum width matters for atom interferometry with Bragg pulses

We theoretically consider the effect of the atomic source's momentum width on the efficiency of Bragg mirrors and beamsplitters and, more generally, on the phase sensitivity of Bragg pulse atom interferometers. By numerical optimization, we show that an atomic cloud's momentum width places a fundamental upper bound on the maximum transfer efficiency of a Bragg mirror pulse, and furthermore limits the phase sensitivity of a Bragg pulse atom interferometer. We quantify these momentum width effects, and precisely compute how mirror efficiencies and interferometer phase sensitivities vary as funct…

Probing Gravity for one Minute with an Optical-Lattice Atom Interferometer

We have realized an atom interferometer that probes gravitational potentials by holding, rather than dropping, atoms. Up to one minute of coherence times are realized by suspending the spatially separated atomic wave packets in an optical lattice that is mode-filtered by an optical cavity. This trapped configuration suppresses phase variance due to vibrations by four to five orders of magnitude, overcoming the dominant noise source in atom-interferometric gravimeters. Recent progress in characterizing and reducing interferometer decoherence led to major increases in coherence and precision, pa…

原子与辐射压力驱动干涉仪的耦合动力学

Coupled dynamics of atoms and radiation pressure driven interferometers

研究了原子被囚禁在腔中的驻波模中的端面镜的运动。原子和光场彼此强烈耦合，因为原子形成反射率可以相当高的分布式布拉格镜。我们分析了原子移动的偶极势如何由于原子的反作用而被修改。我们证明了原子的位置可以变成π。这些结果具有更一般的性质，可以应用于任何情况下，原子被困在一个光晶格内的一个腔，其中的原子对光场的反作用不能忽略。我们分析了绝热极限下耦合系统的动力学，在绝热极限下，光场瞬时地调整到原子和光场的位置，并且原子的移动速度比镜子快得多。我们计算了光通过腔的边带谱，并表明这些谱可以用来探测原子与镜的耦合运动。

原子干涉仪的引力退相干

Gravitational decoherence of atomic interferometers

研究了原子干涉仪在随机引力波散射下的退相干。我们评估的“直接”引力效应登记的相位的物质波以及“间接”效应登记的光波用作分束器和反射镜的物质波。考虑作为一个例子的空间项目HYPER，我们表明，这两种影响是可以忽略不计的，目前研究的干涉仪。

使用囚禁的强相互作用 Feshbach 分子的物质波干涉仪

Matter-wave interferometers with trapped strongly interacting Feshbach molecules

利用囚禁的玻色凝聚 Feshbach 分子实现了Ramsey型和Michelson型两种物质波干涉仪，研究了从弱到强相互作用对干涉仪性能的影响，发现相互作用会引起能级移动、退相和对比度退化等现象。