728 papers
The subatomic world is a realm where matter behaves in ways that defy our everyday intuition, and this category explores the fundamental building blocks of our universe. From the intricate dance of quarks inside a proton to the strange properties of electrons, these studies reveal the deep rules that govern everything from the smallest particles to the largest stars.
At Gist.Science, we track every new preprint in this field as it appears on arXiv, ensuring you stay ahead of the curve. For each discovery, we provide both a clear, plain-language explanation of the core ideas and a detailed technical summary for those who want to dive deeper into the mathematics and methodology.
Below are the latest papers in Atom-Ph, offering fresh insights into the structure and behavior of the atomic scale.
This paper derives and numerically validates an analog of the Lellouch-Lüscher relation for few-body bosonic systems, establishing a robust framework to link harmonically trapped state properties to scattering loss rates and enabling precise determination of multi-body scattering rates in confined ultracold experiments.
This paper theoretically investigates the rotational excitation of asymmetric-top molecular ion isotopologues HO, HDO, and DO by electron impact using a combined framework of R-matrix scattering, multichannel quantum-defect theory, and adapted frame transformation and Coulomb-Born approximations to provide state-resolved cross sections and kinetic rate coefficients.
This paper analytically computes electron-Rydberg atom ionization cross sections for Cesium using quantum mechanical potential scattering, demonstrating that the observed rapid increase in ionization above a specific Rydberg state is driven by the relationship between the scattering length and the orbital radius, with results closely matching experimental data.
This paper extends previous bounds on the axion-photon coupling by over an order of magnitude using the SACLA X-ray free electron laser and the Borrmann effect in Laue crystals, achieving the most stringent laboratory constraints to date for QCD axions in the 3.46–3.48 keV mass range.
This paper experimentally demonstrates the realization of a synthetic monopole in an ultracold spin-1 ensemble, where tunable spin-tensor coupling is used to engineer field anisotropy, directly measure the topological Chern number, and observe a topological phase transition.
This paper demonstrates a robust, high-flux strontium source capable of producing quasi-continuous sub-microkelvin samples without a high-finesse cavity-stabilized laser, utilizing instead a dispersion-optimized fiber frequency comb referenced to either a metrology-grade RF signal or a tunable source stabilized by a magneto-optical trap.
This paper investigates a previously unreported lineshape-asymmetry-caused shift (LACS) in atomic interferometers arising from frequency-chirped laser fields during Ramsey pulses, demonstrating that this shift scales as and thus becomes a significant metrological error source for compact devices with short free-evolution times.
This paper proposes that a long-range parity-violating interaction mediated by the exchange of two neutrinos effectively acts as a contact term in atomic systems, producing a correction that resolves the existing discrepancy between the Standard Model prediction and experimental measurements of cesium parity violation while yielding weak mixing angle and weak charge values consistent with the Standard Model.
This paper presents a breakthrough in Rydberg-atom electric field sensing by overcoming conventional low-frequency limitations through auxiliary modulation and a paraffin-coated vapor cell, enabling electrode-free detection across a wideband range from 0.5 Hz to 10 kHz with state-of-the-art sensitivities.
This paper reports a laboratory measurement demonstrating that while low concentrations of impurities do not affect Coulomb crystallization thresholds in laser-cooled ion crystals, sufficiently high concentrations induce a linear shift due to local pinning, providing critical experimental data to refine models of multicomponent Coulomb matter in stellar environments like white dwarfs and neutron stars.