630 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 theoretically investigates a closed-loop -type atomic system where microwave fields control the Photonic Spin Hall Effect, enabling both differential microwave electrometry and tunable optical switching through precise manipulation of probe detuning and relative phase.
This paper proposes an analog quantum-simulation protocol using atomic ensembles and time-averaged Floquet dynamics to construct four-body potentials for bosonic BFSS-like matrix quantum mechanics, achieving polynomial scaling with matrix size and enabling the simulation of strong-coupling holographic phases.
This paper combines experimental observations with Floquet theory, specifically utilizing the Shirley method, to elucidate the physical mechanisms and higher-order coupling pathways responsible for avoided crossings in AC Stark-shifted Rydberg-EIT spectra that remain unexplained by conventional energy shift maps.
This paper reports the first experimental observation of the complete liquid-to-gas transition in trapped ions by utilizing direct velocity measurements via an integrated velocity map imaging system, revealing that radial localization marks the onset of the liquid regime at warmer temperatures than previously thought and identifying a distinct heating rate power-law change that indicates the maximum density threshold.
This paper presents a zero-field optically pumped magnetometry platform used to characterize the magnetic interference of photodetector and RTD components for portable atomic sensors, revealing that while the RTD readout has negligible impact, the photodetector board introduces significant static fields and noise depending on its orientation, thereby providing critical guidance for component placement in high-sensitivity magnetometers.
This study combines high-level CAP-EOM-EA-CCSD calculations and time-of-flight mass spectrometry to demonstrate that hydroxyl anion (OH) formation in 2-propanol via dissociative electron attachment is driven by specific long-lived two-particle-one-hole Feshbach resonances that facilitate nonadiabatic population transfer into the antibonding orbital, resulting in a prominent yield peak at 8.6 eV.
This paper presents R-matrix photoabsorption cross sections for O VI and O VII ions to analyze how plasma broadening affects their opacity spectra across various temperature and density conditions, revealing significant quantitative differences from previous Opacity Project results due to a richer spectrum of autoionizing resonances that dissolve into the continuum at lower densities than bound-bound lines.
This paper presents a fully autonomous, portable optical frequency standard based on dual-color two-photon excitation of rubidium-87, which achieves high fractional frequency stability ( at 8000s) by integrating commercial telecommunications technologies and a portable optical frequency comb, thereby demonstrating the viability of optical atomic clocks for field deployment beyond laboratory environments.
This paper refines the effective Bloch description of alkali-metal spin dynamics in the SERF regime by demonstrating that longitudinal and transverse spin relaxation are governed by distinct, polarization-dependent nuclear slowing-down factors, and provides closed-form expressions for residual spin-exchange relaxation at finite magnetic fields, thereby correcting previous overestimations of relaxation rates critical for atomic magnetometers and comagnetometers.
This paper theoretically investigates backward Compton scattering between a vortex photon and a plane-wave electron where both final-state particles are projected onto vortex states, deriving analytical cross-sections and demonstrating that the process enables the generation and control of high-energy vortex photons and electrons through distinct energy-angle correlations and topological-charge-dependent interference patterns.