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Related Articles from SNS
Novel approaches for the reliable and efficient numerical evaluation of Landau-type operators
Announce Type: replace Abstract: Numerical approximations of Landau-type operators represent fundamental components of time integration methods for demanding problems such as inhomogeneous Vlasov-Landau-type equations. Substantial computational issues arise from the treatment of the physically most relevant three-dimensional case with Coulomb-type interaction. This work is concerned with the introduction and numerical comparison of novel approaches for the reliable and efficient evaluation...
Novel approaches for the reliable and efficient numerical evaluation of Landau-type operators
arXiv:2402.02247v3 Announce Type: replace Abstract: Numerical approximations of Landau-type operators represent fundamental components of time integration methods for demanding problems such as inhomogeneous Vlasov-Landau-type equations. Substantial computational issues arise from the treatment of the physically most relevant three-dimensional case with Coulomb-type interaction. This work is concerned with the introduction and numerical comparison of novel approaches for the reliable and...
Non-Hermiticity-induced chirality imbalance of Weyl Landau levels
arXiv:2606.00615v1 Announce Type: cross Abstract: Weyl semimetals obey a global chirality constraint: the net chiral topological charge and any associated chiral spectral flow must vanish, as required by the Nielsen-Ninomiya theorem. Under magnetic fields, this constraint manifests through counter-propagating zeroth Landau levels associated with Weyl nodes of opposite chirality. Here, we experimentally demonstrate how non-Hermiticity can reshape this balance in a synthetic photonic Weyl...
Exact solution of the Gaunt-modified Landau-Lifshitz equation in a plane wave
new Abstract: We analyze electron dynamics in a plane electromagnetic wave using the Landau-Lifshitz equation with a quantum radiation reaction correction modeled by a Gaunt factor. In this geometry, the quantum parameter $\chi$ depends solely on the lightfront momentum, allowing the modified equation of motion to retain the integrable structure of the classical problem. We derive an exact solution for the energy evolution and the four-velocity, which reduces to the known classical result in...
Fast spectral separation method for kinetic equation with anisotropic non-stationary collision operator retaining micro-model fidelity
arXiv:2510.15093v2 Announce Type: replace-cross Abstract: We present a generalized, data-driven collisional operator for one-component plasmas, learned from molecular dynamics simulations, to extend the collisional kinetic model beyond the weakly coupled regime. The proposed operator features an anisotropic, non-stationary collision kernel that accounts for particle correlations typically neglected in classical Landau formulations. To enable efficient numerical evaluation, we develop a fast...
Fast spectral separation method for kinetic equation with anisotropic non-stationary collision operator retaining micro-model fidelity
arXiv:2510.15093v2 Announce Type: replace Abstract: We present a generalized, data-driven collisional operator for one-component plasmas, learned from molecular dynamics simulations, to extend the collisional kinetic model beyond the weakly coupled regime. The proposed operator features an anisotropic, non-stationary collision kernel that accounts for particle correlations typically neglected in classical Landau formulations. To enable efficient numerical evaluation, we develop a fast...
Precursor Solitons in Plasma Flow Past Charged Obstacles: Role of Obstacle Bias and Ion Temperature Anisotropy
arXiv:2606.03726v1 Announce Type: new Abstract: We investigate electrostatic ion-acoustic precursor solitons in a plasma flow past an absorbing charged obstacle using two-dimensional (2D) electrostatic PIC simulations. A key outcome of the present formulation is that ion-temperature anisotropy can enable precursor formation even in regimes where isotropic plasmas, due to Landau damping, cannot sustain such structures. Specifically, temperature anisotropy in the 2D drifting flow along the...
D&D-seq maps DNA-protein interactions in single cells with multi-omics compatibility
D&D-seq maps DNA-protein interactions in single cells with multi-omics compatibility Sadie Harley Scientific Editor Robert Egan Associate Editor A new technology allows scientists to map, in single cells, the DNA binding sites of transcription factors and other regulatory proteins that control gene activity, according to a study led by investigators at Weill Cornell Medicine and the New York Genome Center. With key advantages over methods currently in use, the technology is expected to be a...
Generative Drifting is Secretly Score Matching: a Spectral and Variational Perspective
Announce Type: replace Abstract: Generative Modeling via Drifting~\citep{deng2026drifting} has recently achieved state-of-the-art one-step image generation through a kernel-based drift operator, yet its success is largely empirical and its theoretical foundations remain poorly understood. We observe that \emph{under a Gaussian kernel, the drift operator is exactly a score difference on smoothed distributions}. This answers three questions left open in the original work: (1) whether a...
Thanks to natural selection, Indigenous Andeans may digest potatoes better than anyone else in the world, study finds
Thanks to natural selection, Indigenous Andeans may digest potatoes better than anyone else in the world, study finds After domesticating potatoes 10,000 years ago, the ancient people of the Andes evolved to have more copies of a key gene involved in digesting starch. Indigenous Andeans in Peru may be able to digest potatoes and other starches more easily than anyone in the world, a new study finds. Scientists discovered that Indigenous Andeans have more copies of the gene for saliva-based...