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Universal Analytic Solution for the Quantum Transport of Structured Matter-Waves in Magnetic Optics
N. V. Filina, S. S. Baturin
https://arxiv.org/abs/2509.03264 https://

Universal Analytic Solution for the Quantum Transport of Structured Matter-Waves in Magnetic Optics
We present a closed-form analytic solution for the propagation of an arbitrary charged scalar state in a non-uniform magnetic field. The dynamics are governed by classical beam optics parameters (Courant-Snyder parameters), the Twiss functions, and phase advance, revealing a direct map between quantum evolution and its classical counterpart. The solution decomposes into three components, exhibiting a complex rotation dependent on the sign of the orbital angular momentum (OAM) projection, alongs…

Axion lines from nuclear de-excitations in galactic stellar populations
Orion Ning, Anupam Ray, Benjamin R. Safdi
https://arxiv.org/abs/2509.03569 https://…

Axion lines from nuclear de-excitations in galactic stellar populations
We show that mono-energetic axions are produced in abundance through nuclear de-excitations in nearby galaxies such as M87, which is the central galaxy of the Virgo cluster, and the starburst galaxy M82. If the axion couples to both nucleons and photons and is ultralight, then monochromatic hard X-ray signatures are induced by the subsequent axion-to-photon conversion in the magnetic fields permeating these systems. We search for evidence of such signals using NuSTAR data, focusing specifically…

Reciprocity of Magnetism and Nanostructure Growth
Felix Zahner, Kirsten von Bergmann, Roland Wiesendanger, Andr\'e Kubetzka
https://arxiv.org/abs/2509.03202 https://

Reciprocity of Magnetism and Nanostructure Growth
The growth of thin films and nanostructures is a fundamental process for constructing both model-type systems and nanoscale devices, where performance and functionalities can be controlled by the choice of parameters. For magnetic systems the crystal structure, material composition, size, and shape determine already most of the magnetism-related properties. Here, we investigate the reciprocal route, which is controlling nanostructure growth via magnetism. To this end we deposit Co on a uniaxial…

A Model-Based Dictionary Approach for Magnetic Nanoparticle Signal Prediction
Asli Alpman, Mustafa Utkur, Emine Ulku Saritas
https://arxiv.org/abs/2509.01127 https://

A Model-Based Dictionary Approach for Magnetic Nanoparticle Signal Prediction
Magnetic particle imaging (MPI) is a tracer-based medical imaging modality that enables quantification and spatial mapping of magnetic nanoparticle (MNP) distribution. The magnetization response of MNPs depends on experimental conditions such as drive field (DF) settings and medium viscosity, as well as on magnetic parameters of MNPs such as magnetic core diameter, hydrodynamic diameter, and magnetic anisotropy constant. A comprehensive understanding of the magnetization response of MNPs can fa…

Viability Constraints on Baryogenesis in f (R, Lm, T) Gravity
Kalyan Malakar, Rajdeep Mazumdar, Mrinnoy M Gohain, Kalyan Bhuyan
https://arxiv.org/abs/2509.03053 https://

Viability Constraints on Baryogenesis in f (R, Lm, T) Gravity
Our study explores gravitational baryogenesis in the context of f(R, Lm, T) gravity, where R denotes the Ricci scalar, Lm represents the Lagrangian density of the matter field, and T stands for the metric contraction of T_{mu nu}. We focus on a linear model: f(R, Lm, T) = alpha R + beta Lm + gamma T, and examine the parameter constraints for a successful baryon asymmetry generation in four different eras of the cosmos under the assumption of a power-law cosmic expansion. The computed baryon-to-…

Boundary Value Problems for the Magnetic Laplacian in Semiclassical Analysis
Zhongwei Shen
https://arxiv.org/abs/2509.00292 https://arxiv.org/pdf/2509.0029…

Boundary Value Problems for the Magnetic Laplacian in Semiclassical Analysis
This paper is concerned with the magnetic Laplacian $P^h (\A)=(h D+\A)^2$ in semiclassical analysis, where $h$ is a semiclassical parameter. We study the $L^2$ Neumann and Dirichlet problems for the equation $P^h(\A)u=0$ in a bounded Lipschitz domain $Ω$. Under the assumption that the magnetic field $\nabla \times \A$ is of finite type on $\overlineΩ$, we establish the nontangential maximal function estimates for $(h D+\A)u$, which are uniform for $0< h< h_0$. This extends a well-known result…

Magnetic-Field Control of Emergent Order in a 3D Dipolar Pyramid Artificial Spin Ice
Luca Berchialla, Gavin M. Macauley, Flavien Museur, Anja Weber, Laura J. Heyderman
https://arxiv.org/abs/2509.01534 …

Magnetic-Field Control of Emergent Order in a 3D Dipolar Pyramid Artificial Spin Ice
We realize a three-dimensional artificial spin ice of disconnected nanomagnets interacting solely via dipolar coupling, patterned on square pyramids. This Pyramid artificial spin ice, with both tilted and in-plane nanomagnets, supports tunable states. Monte Carlo simulations reveal a rich phase diagram and an emergent square ice of vertex-level effective spins. Tailored demagnetization protocols and magnetic force microscopy allow experimental access to low-energy states, establishing a platfor…

Fast Computation of $k$-Runs, Parameterized Squares, and Other Generalised Squares
Yuto Nakashima, Jakub Radoszewski, Tomasz Wale\'n
https://arxiv.org/abs/2509.02179 https:/…

Fast Computation of $k$-Runs, Parameterized Squares, and Other Generalised Squares
A $k$-mismatch square is a string of the form $XY$ where $X$ and $Y$ are two equal-length strings that have at most $k$ mismatches. Kolpakov and Kucherov [Theor. Comput. Sci., 2003] defined two notions of $k$-mismatch repeats, called $k$-repetitions and $k$-runs, each representing a sequence of consecutive $k$-mismatch squares of equal length. They proposed algorithms for computing $k$-repetitions and $k$-runs working in $O(nk \log k + output)$ time for a string of length $n$ over an integer al…

Intricacies of Frustrated Magnetism in the Kondo Metal YbAgGe
D. G. Mazzone, C. B. Larsen, B. Ueland, X. Boraley, D. M. Pajerowski, Y. Skourski, J. Taylor, B. Fak, S. L. Bud'ko, R. McQueeney, P. C. Canfield, O. Zaharko
https://arxiv.org/abs/2509.02252

Intricacies of Frustrated Magnetism in the Kondo Metal YbAgGe
The combination of localized magnetic moments, their frustration and interaction with itinerant electrons is a key challenge of condensed matter physics. Frustrated magnetic interactions promote degenerate ground states with enhanced fluctuations, a topic that is predominantly studied in magnetic insulators. The coupling between itinerant and localized electrons in metals add complexity to the problem, and presently formulated only for extreme cases in which the itinerant electrons mediate exch…

UV origins of CP-violating leptonic Yukawa couplings
Nejc Ko\v{s}nik, Ajdin Palavri\'c, Aleks Smolkovi\v{c}
https://arxiv.org/abs/2509.04325 https://ar…

UV origins of CP-violating leptonic Yukawa couplings
Probing the CP nature of the Higgs Yukawa couplings is a promising avenue for unraveling new physics effects. In this work, we investigate the possible single- and two-field UV origins of CP-violating leptonic Yukawa couplings, using the Standard Model Effective Field Theory as a stepping stone. We demonstrate a rich set of constraints on the UV model parameters, including direct Higgs measurements, electric and magnetic dipole moments of leptons, charged lepton flavor violating observables, an…