Vibrational spectroscopy of H2+: precise evaluation of the Zeeman effect

单个氮分子离子中被禁止的振动跃迁的量子逻辑光谱学

Quantum-logic spectroscopy of forbidden vibrational transitions in single nitrogen molecular ions

该研究利用量子逻辑光谱学技术，实现了单个氮分子离子中被禁止的旋转-振动跃迁的相干操控，为高精度分子光谱和量子计算提供了新方法。

在单个被困离子的振动模式上的量子计算

Quantum computation over the vibrational modes of a single trapped ion

本研究利用单个被困离子系统中的量子操作，探索连续变量量子计算中的状态制备应用，依托其长相干时间与精确量子比特控制的优势。

Mapping the absolute magnetic field and evaluating the quadratic Zeeman effect induced systematic error in an atom interferometer gravimeter

Precisely evaluating the systematic error induced by the quadratic Zeeman effect is important for developing atom interferometer gravimeters aiming at an accuracy in the regime ( ). This paper reports on the experimental investigation of Raman spectroscopy-based magnetic field measurements and the evaluation of the systematic error in the Gravimetric Atom Interferometer (GAIN) due to quadratic Zeeman effect. We discuss Raman duration and frequency step size dependent magnetic field measurement uncertainty, present vector light shift (VLS) and tensor light shift (TLS) induced magnetic field mea…

Accuracy estimation of the 16O2+ transition frequencies targeting the search for the variation in mp/me

The precise measurement of molecular vibrational transition frequencies is useful in the search for variation in the proton-to-electron mass ratio μ. Homonuclear diatomic molecules are particularly advantageous for precise measurement because of the small Stark shift. This paper discusses the Stark and Zeeman shifts in the 16O2+ vibrational transition frequencies.To search for the variation μ(<10-17/yr), the X2Π1/2(v,J)=(0,1/2)-(v',1/2)(v'>1)in transition frequencies are much more advantageous than the transition frequencies between the X2Π1/2 v=21 and a4Π1/2 v=0 states, whose sensitivity to t…

制备和精确光谱学研究 $^{86}$Sr$_2$ 环状分子

Creation and precise spectroscopy of $^{86}$Sr$_2$ halo molecules

本研究通过单光子光结合反应制备 $^{86}$Sr$_2$ 环状分子，并利用光谱技术测量振动分裂以确定弱束缚态的绝对束缚能，为分子同位移测量奠定基础。

Precise measurements on a quantum phase transition in antiferromagnetic spinor Bose-Einstein condensates

We investigate, both experimentally and theoretically, the quench dynamics of antiferromagnetic spinor Bose-Einstein condensates in the vicinity of a zero temperature quantum phase transition at zero quadratic Zeeman shift q. Both the rate of instability and the associated finite wavevector of the unstable modes - show good agreement with predictions based upon numerical solutions to the Bogoliubov de-Gennes equations. A key feature of this work is inclusion of magnetic field inhomogeneities that smooth the phase transition. Once these were removed, we observed a dramatic sharpening of the tra…

环境系统的系统性粗粒化用于开放量子系统的非微扰模拟

Systematic coarse-graining of environments for the non-perturbative simulation of open quantum systems

本文提出一种构建有效声子谱密度的粗粒化技术，结合非微扰工具可显著降低多体开放量子系统模拟的计算成本。

Shaking the entropy out of a lattice: atomic filtering by vibrational excitations

We present a simple and efficient scheme to reduce atom-number fluctuations in optical lattices. The interaction-energy difference for atoms in different vibrational states is used to remove excess atomic occupation. The remaining vacant sites are then filled with atoms by merging adjacent wells, for which we implement a protocol that circumvents the constraints of unitarity. The preparation of large regions with precisely one atom per lattice site is discussed for both bosons and fermions. The resulting low-entropy Mott-insulating states may serve as high-fidelity register states for quantum …

在长基线双组分原子干涉仪中使用超精细基态交换方法评估二次塞曼效应引起的系统误差

Evaluation of the systematic error induced by quadratic Zeeman effect using hyperfine ground state exchange method in a long-baseline dual-species atom interferometer

本文提出用超精细基态交换（HGSE）方法实时评估长基线双组分原子干涉仪中二次塞曼效应引起的系统误差，并通过两种独立方法交叉验证，在 $10^{-11}$ 精度内结果一致。

低成本演示塞曼效应：从定性观察到定量实验

Low-cost demonstration of the Zeeman effect: From qualitative observation to quantitative experiments

本文提出一种低成本实验方法，通过火焰和钠蒸气灯的组合，直观展示塞曼效应，并通过定量实验研究磁场强度和钠浓度的影响，为教学提供新的实验手段。

用于自旋子物质波精密拉曼控制的复合偏置旋转

Composite Biased Rotations for Precise Raman Control of Spinor Matterwaves

本文提出复合偏置旋转方案，利用单光子失谐中间区域中显著光频移产生的固定偏置角，在纳秒级时间尺度内实现碱金属原子自旋子物质波的精密拉曼控制，填补了光脉冲原子干涉测量中中等功率下高速控制的技术空白。

Probing weak force induced parity violation by high resolution mid-infrared molecular spectroscopy

To date no experiment has reached the level of sensitivity required to observe weak nuclear force induced parity violation (PV) energy differences in chiral molecules. In this paper, we present the approach, adopted at Laboratoire de Physique des Lasers (LPL), to measure frequency differences in the vibrational spectrum of enantiomers. We review different spectroscopic methods developed at LPL leading to the highest resolutions, as well as 20 years of CO2 laser stabilization work enabling such precise measurements. After a first attempt to observe PV vibrational frequency shifts using sub-Dopp…

Magnetic-dipole transitions in highly-charged ions as a basis of ultra-precise optical clocks

We evaluate the feasibility of using magnetic-dipole (M1) transitions in highly-charged ions as a basis of an optical atomic clockwork of exceptional accuracy. We consider a range of possibilities, including M1 transitions between clock levels of the same fine-structure and hyperfine-structure manifolds. In highly charged ions these transitions lie in the optical part of the spectra and can be probed with lasers. The most direct advantage of our proposal comes from the low degeneracy of clock levels and the simplicity of atomic structure in combination with negligible quadrupolar shift. We dem…