Tootfinder

https://www.zeit.de/politik/deutschland/2025-10/horst-seehofer-kritik-markus-soeder-gruene
Seehofer sagt mal was Vernünftiges. Wird er altersweise?
"Das gehört zu den strategischen Fehlentscheidungen in den letzten sieben Jahre…

Eigenstructure of the linearized electrical impedance tomography problem under radial perturbations
Markus Hirvensalo
https://arxiv.org/abs/2510.05966 https://

Eigenstructure of the linearized electrical impedance tomography problem under radial perturbations
We analyze the Fréchet derivative $F$, that maps a perturbation in conductivity to the linearized change in boundary measurements governed by the conductivity equation. The domain is taken to be the unit ball $B \subset \mathbb{R}^d$ with $d \geq 2$, and we choose perturbations $η$ from the Hilbert space $L^2(B)$. Under the condition that the perturbations are rotationally symmetric, we show that the eigenfunctions of the linear approximation $F η$ correspond to the spherical harmonics. Furt…

The (3 1)D structure of the dilute Glasma
Andreas Ipp, Markus Leuthner, David I. M\"uller, S\"oren Schlichting, Kayran Schmidt, Pragya Singh
https://arxiv.org/abs/2508.20725

The (3+1)D structure of the dilute Glasma
We study the (3+1)D structure of the Glasma in the dilute approximation, which allows us to describe the longitudinal dynamics that arise from the three-dimensional nuclear structure. We employ a nuclear model with tunable longitudinal and transverse fluctuation scales that generalizes the McLerran-Venugopalan model. We discuss the longitudinal profiles of the energy-momentum tensor and the transverse structure of the local rest frame energy density.

Friedmann cosmology with hyperfluids of constant equation of state
Ilaria Andrei, Damianos Iosifidis, Laur J\"arv, Margus Saal
https://arxiv.org/abs/2508.18479 https://

Friedmann cosmology with hyperfluids of constant equation of state
We discuss some aspects of cosmology in metric-affine theories of gravity where metric and affine connection are independent variables. Such constructions, apart from the usual energy-momentum tensor, have an additional source, that of hypermomentum. Working with the cosmological principle assumption, we investigate the dynamics of the hypermomentum's degrees of freedom. In particular, we focus on the case where these degrees of freedom are proportional to the matter density and discuss the cos…

Quintessential inflation studied through Semiclassical Methods
Jordan Zambrano, Miguel Agama, Marcos Garz\'on, Werner Bramer-Escamilla, Clara Rojas, Te\'ofilo Vargas
https://arxiv.org/abs/2509.15360

Quintessential inflation studied through Semiclassical Methods
In this work, we solved the scalar and tensor perturbation equations numerically and using the improved uniform approximation method together with the third-order phase-integral method, for the $α$-attractor inflationary model. This inflationary model has become very important because it allows us to describe the initial accelerated expansion of the universe in the inflationary epoch, and the current accelerated expansion with the same potential that depends on one scalar field $φ$. Once the …

SpinAdaptedSecondQuantization.jl 1.0 -- A Simple and Pedagogical Approach to Symbolic Quantum Chemistry
Marcus T. Lexander, Tor S. Haugland, Federico Rossi, Henrik Koch
https://arxiv.org/abs/2508.16342

SpinAdaptedSecondQuantization.jl 1.0 -- A Simple and Pedagogical Approach to Symbolic Quantum Chemistry
The development of new electronic structure methods is a very time consuming and error prone process when done by hand. SpinAdaptedSecondQuantization.jl is an open-source Julia package we have developed for working with automated electronic structure theory development. The code focuses on being user-friendly and extensible, allowing for easy use of both user- and pre-defined fermionic and/or bosonic operators, tensors, and orbital spaces. This allows the code to be used to efficiently investig…

X-ray imaging from nonlinear waves: numerical reconstruction of a cubic nonlinearity
Markus Harju, Suvi Takalahti, Teemu Tyni
https://arxiv.org/abs/2509.11951 https://

X-ray imaging from nonlinear waves: numerical reconstruction of a cubic nonlinearity
We study an inverse boundary value problem for the nonlinear wave equation in $2 + 1$ dimensions. The objective is to recover an unknown potential $q(x, t)$ from the associated Dirichlet-to-Neumann map using real-valued waves. We propose a direct numerical reconstruction method for the Radon transform of $q$, which can then be inverted using standard X-ray tomography techniques to determine $q$. Our implementation introduces a spectral regularization procedure to stabilize the numerical differe…

Dark Energy Survey Year 3 Results: Cosmological constraints from second and third-order shear statistics
R. C. H. Gomes, S. Sugiyama, B. Jain, M. Jarvis, D. Anbajagane, A. Halder, G. A. Marques, S. Pandey, J. Marshall, A. Alarcon, A. Amon, K. Bechtol, M. Becker, G. Bernstein, A. Campos, R. Cawthon, C. Chang, R. Chen, A. Choi, J. Cordero, C. Davis, J. Derose, S. Dodelson, C. Doux, K. Eckert, F. Elsner, J. Elvin-Poole, S. Everett, A. Fert\'e, M. Gatti, G. Giannini, D. Gruen, I. Harri…

Dark Energy Survey Year 3 Results: Cosmological constraints from second and third-order shear statistics
We present a cosmological analysis of the third-order aperture mass statistic using Dark Energy Survey Year 3 (DES Y3) data. We perform a complete tomographic measurement of the three-point correlation function of the Y3 weak lensing shape catalog with the four fiducial source redshift bins. Building upon our companion methodology paper, we apply a pipeline that combines the two-point function $ξ_{\pm}$ with the mass aperture skewness statistic $\langle M_{\rm ap}^3\rangle$, which is an effici…