587 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.
By solving the 3D time-dependent Schrödinger equation for strong-field ionization of helium, this study supports experimental angular offset values derived from non-adiabatic field intensity calibration, thereby contradicting the adiabatic calibration results and the semiclassical conclusions of Boge et al. regarding tunneling time extraction in attoclock measurements.
This paper presents both experimental and theoretical evidence that the transverse electron momentum distribution in strong-field atomic ionization evolves qualitatively differently in the tunneling versus over-the-barrier regimes as the ellipticity of the driving laser pulse increases.
This study utilizes the dipole relativistic random phase approximation to investigate the angular dependence of photoemission time delays for valence and subshells in Ar, Kr, and Xe, revealing strong anisotropy near Cooper minima and significant spin-orbit effects near the ionization threshold.
This paper demonstrates and validates a technique for accurately retrieving atomic ionization phases and time delays from XUV photoelectrons streaked by a circularly polarized IR field, confirming its equivalence to RABBITT simulations via numerical solutions of the time-dependent Schrödinger equation for hydrogen.
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.