Chaotic scattering and heating in cold ion-atom collisions: two sides of the same coinWe study the classical dynamics of a Paul-trapped ion in a low-density bath of atoms above 1 μK. We find that lower energy collisions with more massive atoms, especially at energies less…Saajid Chowdhury, Jesús Pérez Ríos·Sep 18, 2025SaveLearn
A zero-dead-time strontium lattice clock with a stability at 10-19 levelOptical atomic clocks play a crucial role in fundamental physics, relativistic geodesy, and the future redefinition of the SI second. Standard operation relies on cyclic interrogation sequences,…Xiao-Yong Liu, Peng Liu, Jie Li et al.·Sep 18, 2025SaveLearn
Improved systematic evaluation of a strontium optical clock with uncertainty below 1× 10-18We report a systematic uncertainty of 9.2× 10-19 for the USTC Sr1 optical lattice clock, achieving accuracy at the level required for the roadmap of the redefinition of the SI second. A…Zhi-Peng Jia, Jie Li, De-Quan Kong et al.·Sep 17, 2025SaveLearn
Direct loading of a Sr magneto-optical trap from a thermal atomic beamWe demonstrate direct loading of a strontium (Sr) magneto-optical trap (MOT) from a thermal atomic beam in a single-chamber vacuum system. The MOT operates without a Zeeman slower, a slowing laser, a…Naohiro Okamoto, Takumi Sato, Takatoshi Aoki et al.·Sep 17, 2025SaveLearn
Broadband femtosecond lasers enable efficient two-photon excitation of the ultranarrow linewidth singlet 1s2s state in heliumWe propose a broadband, femtosecond two-photon excitation scheme for efficient population transfer to the ultra-narrow linewidth 1s2s\ 1S0 metastable state in helium. Using 120 nm vacuum…Shashank Kumar, Justin D. Piel, Chris H. Greene et al.·Sep 17, 2025SaveLearn
A 3He-21Ne Ramsey Comagnetometer with sub-nHz frequency resolutionNuclear spin comagnetometers offer exceptional precision in measurements of spin energy levels and exhibit long-term stability, making them powerful tools for probing spin-dependent physics beyond…Shaobo Zhang, Jingyao Wang, George Sun et al.·Sep 16, 2025SaveLearn
Elastic and Spin-Changing Cross Sections of Spin-Polarized Atomic TritiumThe rates of elastic and inelastic scattering processes of spin-polarized atomic tritium are vital inputs for the design and operation of experiments using cold, magnetically trapped tritium atoms.…M. G. Elliott, B. J. P. Jones·Sep 16, 2025SaveLearn
Simple Vector Magnetometer Based on Ground State Hanle EffectWe present a method for determining the azimuthal phase (angle) of a magnetic field by exploiting phase matching of laser beams in a ground-state Hanle effect (GHSE) configuration. This approach is…Nayan Sharma, Ranjit Kumar Singh, Ajay Tripathi·Sep 16, 2025SaveLearn
Dynamical phase evolution of Coulomb-focused electrons in strong-field ionization probed by a standing light waveWe investigate the dynamical phase evolution of Coulomb-focused electrons in strong-field ionization. We diffract the electrons with an ultrashort standing light wave to track their time-dependent…Yuan Gu, Hao Liang, Weiran Zheng et al.·Sep 16, 2025SaveLearn
GPU-Accelerated MATLAB Software for Atom-Ion DynamicsWe present a MATLAB script which can use GPU acceleration to simulate a trapped ion interacting with a low-density cloud of atoms. This script, called atomiongpu.m, can massively parallelize MD…Saajid Chowdhury, Jesús Pérez-Ríos·Sep 15, 2025SaveLearn
Geometric interpretation of the hyperfine Breit--Rabi solutionWe present a geometric interpretation of the hyperfine Breit--Rabi eigenvalues and eigenvectors in alkali atoms after reformulating the standard solution into a compact form. In this picture, the…Lihong V. Wang·Sep 15, 2025SaveLearn
Collective resonance displacement in strongly driven cold atomsCold atoms are promising platforms for metrology and quantum computation, yet their many-body dynamics remains largely unexplored. We here investigate Rabi oscillations from optically-thick cold…Mateus A. F. Biscassi, Robin Kaiser, Mathilde Hugbart et al.·Sep 15, 2025SaveLearn
Attosecond Time Delays at Cooper Minima in Valence-Shell Photoionization of Alkali and Alkaline-Earth Metal AtomsJi ηl [New J. Phys. 26, 093014 (2024)] established a direct link between the photoionization cross section and the attosecond time delay near Cooper minima (CM) in the valence shells of…Adam J. C. Singor, Dmitry V. Fursa, Igor Bray et al.·Sep 13, 2025SaveLearn
First operation of the FAMU experiment at the RIKEN-RAL high intensity muon beam facilityThe FAMU experiment, supported and funded by the Italian Institute of Nuclear Physics (INFN) and by the Science and Technology Facilities Council (STFC), aims to perform the first measurement of the…FAMU Collaboration, A. Adamczak, D. Bakalov et al.·Sep 12, 2025SaveLearn
A novel method for measuring the Fermi velocity of elemental targetsThe right kind of theoretical treatment of direct Coulomb ionization of inner-shell of target atoms including multiple ionization of their outer-shells by using accurate x-ray fluorescence yield data…Manpreet Kaur, T. Nandi·Sep 12, 2025SaveLearn
High-sensitivity molecular spectroscopy of SrOH using magneto-optical trappingPolyatomic molecules are projected to be powerful tools in searches for physics beyond the Standard Model (BSM), including new CP-violating (CPV) interactions and ultralight dark matter (UDM)…Annika Lunstad, Hiromitsu Sawaoka, Zack Lasner et al.·Sep 11, 2025SaveLearn
A generalized independent atom model approach for net ionization of molecules by multiply-charged heavy-ion impactThe previously applied independent atom model (IAM) for highly charged ion-molecule collisions which implemented the suppression of multiple ionization and capture on the basis of geometric overlaps…Hans Jürgen Lüdde, Marko Horbatsch, Tom Kirchner·Sep 11, 2025SaveLearn
All-Order Wichmann and Kroll Contribution in Heavy Electronic and Exotic AtomsWe present a theoretical study of the Wichmann and Kroll correction to the one-loop vacuum polarization (VP) to all-orders in α Z. We consider electronic, muonic, and antiprotonic atoms for a…Jonas Sommerfeldt, Paul Indelicato·Sep 10, 2025SaveLearn
Isotope shift spectroscopy in mercury vapors: a valid alternative to ytterbium for new physics searchPrecision isotope shift metrology in the deep-UV region has been performed for all bosonic isotopes of mercury with a zero nuclear spin, by using the technique of frequency-comb referenced,…Stefania Gravina, Antonio Castrillo, Livio Gianfrani·Sep 10, 2025SaveLearn
Intensity-dependent precision two-photon Doppler-free spectroscopy of Xe using narrow-bandwidth long-pulse deep-UV laser radiationWe report on a precision measurement of the (5p)56p \, [1/2]0← (5p)6 \, 1S0 transition wavenumber of Xe by Doppler-free two-photon…M. H. Rayment, R. Stech, F. Merkt·Sep 9, 2025SaveLearn
The Independent Atom Model -- Pixel Counting Method for Ion-Molecule CollisionsThe independent atom model - pixel counting method (IAM-PCM) for the description of ion-molecule collisions is reviewed. The method was introduced (in 2016) to improve on the simple additivity rule…Hans Juergen Luedde, Marko Horbatsch, Tom Kirchner·Sep 9, 2025SaveLearn
Antiprotonic atoms with nonperturbative inclusion of vacuum polarization and finite nuclear massWe demonstrate that energy levels of excited states in a hydrogenic system consisting of an arbitrary nucleus and an antiproton can be calculated within the framework of nonrelativistic quantum…V. Patkóš, K. Pachucki·Sep 9, 2025SaveLearn
Continuous cloud position spectroscopy using a magneto-optical trapWe demonstrate a continuous spectroscopy technique with frequency sensitivity well below the natural transition linewidth, while maintaining a locking range hundreds of times larger. The method…Benedikt Heizenreder, Ananya Sitaram, Sana Boughdachi et al.·Sep 9, 2025SaveLearn
Benchmarking the Plane-Wave Born and Distorted Waves approximations for electron-impact collision strength computations: the sample case of Sr IIThe discovery of gravitational waves from a neutron star merger in 2017 (GW170817) and the associated kilonova (AT2017gfo) confirmed these events as key sites for heavy element production through the…Jérôme Deprince, Lucas Maison·Sep 9, 2025SaveLearn
Prevention of Yb adsorption by paraffin coatingYtterbium (Yb) is used in cold-atom systems, including magneto-optical traps and optical lattice clocks. However, the long-term operation of such systems may be associated with substantial…Kanta Asakawa, Taichi Kobayashi, Masami Yasuda et al.·Sep 9, 2025SaveLearn