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 utilizes attosecond angular streaking to investigate orientation-dependent time delays and two-center interference in the XUV photoionization of H, revealing that the observed interference pattern implies an effective photoelectron momentum greater than the asymptotic value due to the influence of the molecular potential well.
This paper establishes that shape resonances in photoionization provide a fundamental link between the photoionization cross section and the Wigner time delay, enabling the extraction of time delays from existing cross-section data to validate modern interferometric measurements.
This paper demonstrates that the mutual polarization angle between non-collinear laser pulses provides an efficient mechanism for controlling the magnitude and phase of two-photon XUV+IR ionization in noble gas atoms within the RABBITT process, a finding validated through perturbation theory, numerical simulations, and comparison with recent experimental and theoretical results.
This paper proposes a method to extract the magnitude and phase of two-photon XUV+IR ionization amplitudes by exploiting the circular dichroic phase observed in RABBITT measurements, enabling fully ab initio characterization for s-electron targets and realistic characterization for heavier noble gases.
This paper proposes a method to determine the resonant lifetime of Fano resonances in diverse quantum systems by exploiting time-locked XUV and IR pulses to transform the characteristic asymmetric Fano line shape into a symmetric Gaussian profile once the photoelectron leaves the parent ion, thereby enabling direct measurement without requiring extremely fine energy resolution.
This paper reports the numerical observation of a universal far-from-equilibrium equation of state in the Gross-Pitaevskii model, demonstrating that in a regime of mixed turbulence, the momentum distribution amplitude scales with the energy flux to the power of approximately 0.67, a finding that extends the concept of quasi-static thermodynamic processes to non-equilibrium steady states.
This review presents a unified theoretical approach linking resonant photoionization cross-sections to photoemission time delays via the analytic properties of ionization amplitudes, illustrating the method across various resonance types and extending the analysis to two-photon resonant processes and autoionizing state lifetimes measured through laser-assisted interferometric techniques.
This chapter explores how planetary nebulae, formed by mass ejection from dying low-to-intermediate mass stars, serve as invaluable laboratories for studying astrophysics, astrochemistry, and astromineralogy.
This paper introduces circular under-threshold RABBITT (cuRABBITT), a novel interferometric technique that utilizes circularly polarized attosecond pulses and rainbow spectral analysis to continuously map bound-state resonances and extend Fano's propensity rule into the under-threshold regime for atoms like helium, argon, and xenon.
This study presents the first *ab initio* calculation of the nuclear Schiff moment for the F isotope using the no-core shell model, which, when combined with quantum chemistry calculations and experimental data on HfF, establishes the first experimental bound on this moment and its associated pion-nucleon-nucleon coupling constants.