气体自旋共轴磁强计中新的系统效应

无死区自由感应衰减碱金属原子磁力计

Dead-zone-free free-induction-decay alkali-metal atomic magnetometer

本研究将相关技术整合到Bell-Bloom光抽运的FID磁力计中，通过多通腔气室加反射镜消除死区，实现三维全空间优于80 fT/Hz^(1/2)的灵敏度，为矢量FID磁力计奠定基础。

基于微波驱动拉比频率测量的高精度矢量光泵磁力计

Accurate vector optically pumped magnetometer with microwave-driven Rabi frequency measurements

提出一种利用$^{87}$Rb超精细拉比振荡测量磁场方向的矢量光泵磁力计，通过原子测量补偿系统偏移，实现0.46 mrad精度和11 $\mu$rad/√Hz灵敏度，超越1度阈值。

A Highly Drift-stable Atomic Magnetometer for Fundamental Physics Experiments

We report the design and performance of a non-magnetic drift stable optically pumped cesium magnetometer with a measured sensitivity of 35 fT at 200 s integration time and stability below 50 fT between 70 s and 600 s. To our knowledge this is the most stable magnetic field measurement to date. The sensor is based on the nonlinear magneto-optical rotation effect: in a Bell-Bloom configuration a higher order polarization moment (alignment) of Cs atoms is created with a pump laser beam in an anti-relaxation coated Pyrex cell under vacuum, filled with Cs vapor at room temperature. The polarization…

同时激发取向和排列CPT共振的各向同性磁力测定法

Isotropic magnetometry with simultaneous excitation of orientation and alignment CPT resonances

原子磁力计具有非常高的绝对精度和对磁场的灵敏度，但存在一个基本问题：光与原子的矢量或张量相互作用导致“死区”，即磁力计失去灵敏度的磁场的某些取向。我们展示了一个简单的偏振调制方案，同时创建相干布居捕获（CPT）的方向和对齐，从而消除死区。使用$^{87}$ Rb在一个10托缓冲气体电池，我们测量狭窄，高对比度的CPT透明峰在所有方向上，也显示出与非线性塞曼分裂系统的影响。

Dual-Species Synchronous Spin-Exchange Optical Pumping

We demonstrate a novel quantum sensor for measuring non-magnetic spin-dependent interactions. This sensor utilizes $^{131}$Xe, $^{129}$Xe, and $^{85}$Rb which are continuously polarized transverse to a pulsed bias field. The transverse geometry of this spin-exchange pumped comagnetometer suppresses longitudinal polarization, which is an important source of systematic error. Simultaneous excitation of both Xe isotopes is accomplished by frequency modulating the repetition rate of the bias field pulses at subharmonics of the Xe Larmor resonance frequencies. The area of each bias pulse causes $2π…

地球磁场中原子十六极的产生与探测

Production and detection of atomic hexadecapole at Earth's magnetic field

原子态的各向异性由塞曼子能级间的布居数差异和相干性表征。它可以通过与光的共振相互作用有效地产生和探测，这种技术是现代原子钟和磁力计的核心。近年来，非线性磁光技术的发展使得碱金属原子的基态具有更高的极化矩，即十六极和六十四极。将这些技术推广到地磁场范围对实际应用具有重要意义。这是因为对应于$ΔM=4$塞曼相干性的十六极极化对非线性塞曼效应（NLZ）不敏感，其中对于电子角动量$J=1/2$和核自旋$I=3/2$具有最大可能的$ΔM$。这是特别感兴趣的，因为NLZ通常导致原子磁力计中的共振分裂和系统误差。然而，由于十六极矩的光信号作为磁场的函数急剧下降。我们报告了一种新的方法，允许选择性地创建一个宏观的长寿命的基态十六极极化。十六极信号对NLZ的免疫性用F=2的$^{87}$ Rb原子在地球场证明。

Continuous Comagnetometry using Transversely Polarized Xe Isotopes

We demonstrate a transversely polarized spin-exchange pumped noble gas comagnetometer which suppresses systematic errors from longitudinal polarization. Rb atoms as well as $^{131}$Xe and $^{129}$Xe nuclei are simultaneously polarized perpendicular to a pulsed bias field. Both Xe isotopes' nuclear magnetic resonance conditions are simultaneously satisfied by frequency modulation of the pulse repetition rate. The Rb atoms detect the Xe precession. We highlight the importance of magnetometer phase shifts when performing comagnetometry. For detection of non-magnetic spin-dependent interactions th…

热气体中自旋扩散模式的光学调控与相干耦合

Optical control and coherent coupling of spin diffusive modes in thermal gases

本文研究热原子气体中自旋扩散模式的光学选择性激发与操控，发现抗光泵浦系统误差的模式条件，并揭示空间不均匀泵浦可诱导长寿命模式间的相干耦合，为提升碱金属热气体量子技术性能提供新途径。

瞬态SERF磁测量中标量减速模型的系统性误差

Systematic errors from scalar slowing-down models in transient SERF magnetometry

针对SERF磁力计标量减速模型在极化变化时失效的问题，提出含纵向与横向减速因子的动态布洛赫方程，降低磁场估计偏差并保留模型简洁性。

微型硅晶片气室中碱金属气体的间接光泵浦

Indirect pumping of alkali-metal gases in a miniature silicon-wafer cell

本文设计并实现了一种具有双腔室结构和集成加热器的微型硅晶片气室，通过间接光泵浦实验系统研究了自旋动力学特性，并与厘米级石蜡涂层气室进行基准对比，在非零磁场和原子散粒噪声限制条件下获得了约100 Hz的磁共振线宽，为射频驱动原子磁力计的优化提供了依据。