Wichmann-Kroll Correction to the Interelectronic Interaction in He- and Li-Like IonsWe present a theoretical study of the higher-order QED contribution to the interelectronic interaction in He- and Li-like ions, where a virtual electron-positron loop is inserted into the photon line…J. Sommerfeldt, V. A. Yerokhin, Z. Harman et al.·Jul 16, 2026SaveLearn
Electron loss and target excitation in keV-energy proton collisions with B and C+The one-centre Coulomb-Sturmian convergent close-coupling method is applied to proton collisions with the boron atom and singly charged carbon ion. Here we report an update to our target-structure…N. W. Antonio, I. B. Abdurakhmanov, A. Espinosa-Gayosso et al.·Jul 16, 2026SaveLearn
A vacuum-ultraviolet spectropolarimeter for an electron beam ion trapWe have developed a vacuum-ultraviolet spectropolarimeter for an electron beam ion trap (EBIT) to measure the linear polarization of emission lines from multiply charged ions around the Lyman-α…Nobuyuki Nakamura, Ryohko Ishikawa, Motoshi Goto·Jul 16, 2026SaveLearn
Atomic clock frequency ratios with fractional uncertainty ≤ 3.2 × 10-18We report high-precision frequency ratio measurements between optical atomic clocks based on 27Al+, 171Yb, and 87Sr. With total fractional uncertainties at or below $3.2 ×…Alexander Aeppli, Willa J. Arthur-Dworschack, Kyle Beloy et al.·Jul 16, 2026SaveLearn
Rate coefficients for dielectronic recombination of N-like NeDielectronic recombination (DR) for the process Ne3+ + e- → Ne2+ was investigated in a merged-beams arrangement at the heavy-ion storage ring CRYRING@ESR. The…E. -O. Hanu, M. Lestinsky, E. B. Menz et al.·Jul 15, 2026SaveLearn
Ionization rate vs. laser intensity determined from ion count vs. peak intensity due to neutral gas exposure to an 800 nm ultrashort pulsed laserThe optical cycle-averaged ionization rate of Ar, O2, and N2 vs. local instantaneous laser intensity I for linear polarized 800 nm light is determined up to approx. 300 TW/cm2 by…Edward L. Ruden·Jul 15, 2026SaveLearn
A robust and modular cesium magneto-optical trap using diverging laser beamsMagneto-optical traps (MOTs) are a workhorse technology for neutral-atom quantum sensing, simulation, and computing. Here, we demonstrate a MOT optimized for inertial quantum sensing and precision…Paola Luna, Kenneth Nakasone, Andrei Zhukov et al.·Jul 14, 2026SaveLearn
High-fidelity entanglement of polar molecules by dynamic geometric controlIn quantum information systems made of optical tweezer arrays of ultracold molecules, thermal motion of molecules degrades the coherence of their interactions, which limits entanglement fidelity and…Scarlett S. Yu, Avikar Periwal, Jiaqi You et al.·Jul 14, 2026SaveLearn
A cryogenic neutral-atom platform with full optical access and 2-hour trap lifetimeNeutral-atom quantum processors are rapidly scaling toward system sizes of more than ten thousand qubits, allowing for the realization of a new class of quantum computing algorithms and quantum…Akhil Kumar, Lorenzo Festa, Avishay Grinberg et al.·Jul 14, 2026SaveLearn
Optically Derived Radio-Frequency Benchmark in Methanol: A Sub-kHz Reference for Astrophysical Tests of Fundamental PhysicsMethanol radio lines observed in space provide sensitive probes of whether the proton-to-electron mass ratio has changed over cosmic time, but such tests require laboratory rest frequencies with very…Frank M. J. Cozijn, Arthémise Altman, Alexandr S. Bogomolov et al.·Jul 14, 2026SaveLearn
Coherence enhancement of Rydberg polaritonsQuantum nonlinear optics by Rydberg polaritons can enable single-photon transistor and switch, single-photon source, and deterministic quantum information processing. A major hindrance in this study…Xiao-Feng Shi, Yan Lu, Yuechun Jiao et al.·Jul 14, 2026SaveLearn
Development of an electrodynamic balance to study single levitated particles exposed to alkali-metal vaporElectrodynamic balances (EDBs) have been widely used to investigate reactions between levitated particles and background gases. In this paper, we report the development of an EDB that exposes trapped…Akira Kamada, Borjid Jiyatai, Atsushi Hatakeyama·Jul 14, 2026SaveLearn
Determination of atomic number density in MEMS vapor cells via single-pass absorption spectroscopy (SPAS)Micro-electro-mechanical systems (MEMS)-based (chip-scale) alkali vapor cells are key components in emerging quantum technologies, where device performance critically depends on the atomic number…Sumit Achar, Shivam Sinha, Ezhilarasan M et al.·Jul 14, 2026SaveLearn
Ground and excited potential energy surfaces for CaF+Ca interactions and isotope exchange reactionsWe investigate the intermolecular interactions between laser-cooled CaF and Ca, in their ground and excited electronic states, aiming to understand atom-exchange reaction pathways. Using…Dibyendu Sardar, John L. Bohn·Jul 14, 2026SaveLearn
Pr10+ as a candidate for a high-accuracy optical clock for tests of fundamental physicsWe propose In-like Pr10+ as a candidate for the development of a high-accuracy optical clock with high sensitivity to a time variation of the fine-structure constant, ( alpha/alpha, as well as…S. G. Porsev, C. Cheung, M. S. Safronova et al.·Jul 14, 2026SaveLearn
Defect assignment of the clock site in 229Th:CaF2The performance of solid-state 229Th nuclear clocks depends sensitively on the microscopic environment of the thorium nucleus in the host crystal. Here we reassess the dominant…Daniel A. Rehn, Harry W. T. Morgan, Harris E. Mason et al.·Jul 13, 2026SaveLearn
Fourier imaging of collective spontaneous emission modes in superradiant cold atomic cloudsWe measure the spatial pattern associated with the superradiant emission from a cloud of cold 87Rb atoms using Fourier imaging. We observe a highly directional, ring-shaped emission structure, which…Adrien Gavalda, Guillaume Tremblier, Martin Poitrinal et al.·Jul 12, 2026SaveLearn
On the measurability of Wigner time delays at shape resonances in photodetachment of polyatomic anionsThe energy dependence of the complex phases of electron continuum wave functions carries information about electron dynamics. Streaking and attosecond interference experiments (called RABBIT) seek to…Jan Dvořák, Jakub Benda, Thomas N. Rescigno et al.·Jul 11, 2026SaveLearn
Collisions and Stopping of Fast Charged Particles in MatterThis text is intended to offer a consistent presentation of the theory of collisions and stopping of charged particles in matter, limited to the range of intermediate kinetic energies where atomic…Francesc Salvat·Jul 11, 2026SaveLearn
Exact Semiclassical Phase Shifts for Relativistic Atom Interferometers in Flat SpacetimeAtom interferometry is a sensitive tool for measuring relativistic effects, but there are no known non-trivial exact solutions for relativistic atom interferometer phase shifts. Here we derive…Hunter Swan, Jason M. Hogan·Jul 10, 2026SaveLearn
Characterisation of a strontium cold atom source using fluorescence spectroscopy and time-of-flightWe demonstrate a characterisation methodology for a strontium atomic beam, produced by a two-dimensional magneto-optical trap and delivered via a resonant push beam, using fluorescence spectroscopy…Kamran Hussain, Hamza Labiad, Anna L. Marchant et al.·Jul 10, 2026SaveLearn
Optimal Control Design of Robust Raman Pulses for High-Fidelity Cold-Atom InterferometryThe performance of high-precision cold-atom interferometers is often limited by imperfections in the Raman laser fields. We present a reproducible framework for robust Raman mirror-pulse design and…Ziwen Song·Jul 10, 2026SaveLearn
Observation of node-dependent Rydberg molecular bound statesUltralong-range Rydberg molecules, formed by the interaction between a highly excited Rydberg atom and a ground-state atom, provide a unique platform for exploring quantum phenomena spanning…Qing Li, Shi-Yao Shao, Jun Zhang et al.·Jul 9, 2026SaveLearn
Efficient photo-ionizing elimination of detrimental electric fields for Rydberg atomsRydberg atoms are highly sensitive to external electric fields due to their exaggerated electronic properties. This unique feature lays the foundation for many of their applications in quantum…Zhou-Chen Deng, Hao-Nan Lin, Yu-Cheng Duan et al.·Jul 9, 2026SaveLearn
Extracting inter-nuclear distances in the oxygen molecule interacting with an XFEL-pulse: a fundamental system for understanding Coulomb explosion imagingWe investigate the interaction of O2 with an X-ray Free Electron laser (XFEL) pulse of short duration. We consider a photon energy of 570 eV, which allows for the formation of molecular states…Zixu Wang, Georgios Petros Katsoulis, Giorgio Visentin et al.·Jul 9, 2026SaveLearn