429 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 establishes and experimentally verifies the "Kubo-Thermalization correspondence," an exact theoretical link connecting long-time quantum thermalization dynamics to short-time linear-response spectra in strongly interacting systems, thereby enabling the inference of thermalization behavior from equilibrium measurements.
This paper employs a relativistic hybrid configuration-interaction and coupled-cluster approach to calculate hyperfine-structure constants for various states of the Sc ion, achieving improved agreement with experimental data and deriving a nuclear quadrupole moment of b that aligns with recent molecular findings.
By means of few-level models, this study demonstrates that sub-threshold harmonics in aligned molecules exhibit pronounced phase alternations and polarization behaviors that depend on their energy relative to transition frequencies, thereby enabling the prediction of a mirrored polarization in higher-order harmonics for systems with orthogonal transition dipole moments.
This study employs high-level relativistic coupled-cluster calculations to determine critical atomic properties of the Th ion, enabling precise estimates of nuclear charge radii and moments while simultaneously revealing significant higher-order relativistic effects that are essential for advancing nuclear clock technology and fundamental physics research.
This paper defines and characterizes completely positive, non-signalling non-Markovian quantum dynamics as an integro-differential equation extending the Lindblad formalism, enabling the exact calculation of multi-time correlations and the derivation of memory-encoded spectral features without relying on the regression theorem.
This study demonstrates that a magneto-optical trap acting as a low Reynolds number cold atom fluid exhibits kinematic reversibility under controlled external forces despite interparticle interactions, while also revealing conditions where system hysteresis leads to deviations from this reversibility.
This paper theoretically and experimentally demonstrates that optimizing the phase modulation of the coupling beam in a hot Rydberg atom-based RF receiver significantly enhances its detection bandwidth, enabling the bridging of a 166 MHz gap between Rydberg transitions and outperforming conventional protocols for signals detuned by more than a few MHz.
This contribution proposes and demonstrates that the utilization of cascade decay pathways via nuclear excitation by inelastic electron scattering (NEIES) and nuclear excitation by electron capture (NEEC) in storage rings and electron beam ion traps can significantly increase the production yield of the Th isomer, thereby facilitating its application in nuclear clocks and precision metrology.
This paper investigates the isotopic dependence of collisional widths and shifts for the Hg clock transition perturbed by cold Rb atoms across a wide temperature range, demonstrating how shape resonances and reduced mass variations significantly influence collisional line shape parameters through both full quantum and semi-classical scattering calculations.
This paper presents a delay-programmable two-color femtosecond source based on a chirped-seed noncollinear optical parametric amplifier that enables flexible generation of independently tunable pulses with adjustable timing, which was successfully demonstrated in a COLTRIMS experiment on trapped lithium atoms to reveal delay-dependent multiphoton ionization pathways.