Tootfinder

Good morning friends!
I didn't post a lot of #morningwalk photos recently but I've been out for a walk every day.
Currently it's a bit above freezing. But I'd be ready for spring now to be honest. I'm quite sure there will be a short come back for winter as in every year but.. Uff. Spring would be fine as well 😉

Judge puts brakes on new law banning foreign government spending on referendums | Financial Post
https://financialpost.com/pmn/business-pmn/judge-puts-brakes-on-new-law-banning-foreign-government-spending-o…

Lattice dynamics of altermagnetic ruthenium oxide RuO$_{2}$
Surajit Basak, Andrzej Ptok
https://arxiv.org/abs/2403.07609 https://arxi…

Lattice dynamics of altermagnetic ruthenium oxide RuO$_{2}$
Altermagnetic ruthenium oxide RuO$_{2}$ crystallizes with P4$_{2}$/mnm symmetry. Here we discuss the lattice dynamics of this structure. We show and discuss the phonon dispersion and density of states. The phonon dispersion curves contain several Dirac nodal lines and highly degenerate Dirac points. We present the characteristic frequencies and their irreducible representations at the $Γ$ point. Theoretically obtained frequencies of the Raman active modes nicely reproduce the ones reported exp…

Si Superstrate Lenses on Patch-Antenna-Coupled TeraFETs: NEP Optimization and Frequency Fine-Tuning
Anastasiya Krysl, Dmytro B. But, K\k{e}stutis Ikamas, Jakob Holstein, Anna Shevchik-Shekera, Hartmut G. Roskos, Alvydas Lisauskas
https://arxiv.org/abs/2404.07715

Si Superstrate Lenses on Patch-Antenna-Coupled TeraFETs: NEP Optimization and Frequency Fine-Tuning
This paper presents a study on performance optimization and resonant frequency modification of terahertz detectors by the use of hyper-hemispherical silicon superstrate lenses. The detectors are patch-TeraFETs, i.e., field-effect transistors with monolithically integrated patch antennas fabricated with a commercial 65-nm CMOS foundry process and designed for an operation frequency of 580 GHz. We demonstrate a strong improvement of the optical noise-equivalent power optical NEP, referenced again…

Dieser Podcast über Aninas Kampf mit #PostCOVID ist wichtig. Seit über 800 Tagen hat sie das Bett nicht verlassen. 🎧👉 https://fel…

8x8 Patch-Antenna-Coupled TeraFET Detector Array for Terahertz Quantum-Cascade-Laser Applications
Jakob Holstein, Nicholas K. North, Michael D. Horbury, Sanchit Kondawar, Iman Kundu, Mohammed Salih, Anastasiya Krysl, Lianhe Li, Edmund H. Linfield, Joshua R. Freeman, Alexander Valavanis, Alvydas Lisauskas, Hartmut G. Roskos
https://

8x8 Patch-Antenna-Coupled TeraFET Detector Array for Terahertz Quantum-Cascade-Laser Applications
Monolithically integrated, antenna-coupled field-effect transistors (TeraFETs) constitute rapid and sensitive detectors for the terahertz range (0.3 THz to 10 THz) that can operate at room temperature. Here, we conducted an experimental characterization of a single patch-antenna coupled TeraFET optimized for 3.4 THz operation. This characterization utilized a single-mode high-power terahertz Quantum-Cascade-Laser (QCL) emitting at the designated frequency (2.85 THz and 3.4 THz). Subsequently, w…

Statistical Analysis of High-frequency Whistler Waves at Earth's Bow Shock: Further Support for Stochastic Shock Drift Acceleration
Takanobu Amano, Miki Masuda, Mitsuo Oka, Naritoshi Kitamura, Olivier Le Contel, Daniel J. Gershman
https://arxiv.org/abs/2404.07404

Statistical Analysis of High-frequency Whistler Waves at Earth's Bow Shock: Further Support for Stochastic Shock Drift Acceleration
We statistically investigate high-frequency whistler waves (with frequencies higher than $\sim 10$ % of the local elect ron cyclotron frequency) at Earth's bow shock using Magnetospheric Multi-Scale (MMS) spacecraft observations. We focus specifically on the wave power within the shock transition layer, where we expect electron acceleration via stochastic sh ock drift acceleration (SSDA) to occur associated with efficient pitch-angle scattering by whistler waves. We find that the wave power is …

This https://arxiv.org/abs/2310.11225 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Sparse grid approximation of stochastic parabolic PDEs: The Landau--Lifshitz--Gilbert equation
We show convergence rates for a sparse grid approximation of the distribution of solutions of the stochastic Landau-Lifshitz-Gilbert equation. Beyond being a frequently studied equation in engineering and physics, the stochastic Landau-Lifshitz-Gilbert equation poses many interesting challenges that do not appear simultaneously in previous works on uncertainty quantification: The equation is strongly non-linear, time-dependent, and has a non-convex side constraint. Moreover, the parametrization…

This https://arxiv.org/abs/2307.14223 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csLO_…

Rewriting and Completeness of Sum-Over-Paths in Dyadic Fragments of Quantum Computing
The "Sum-Over-Paths" formalism is a way to symbolically manipulate linear maps that describe quantum systems, and is a tool that is used in formal verification of such systems. We give here a new set of rewrite rules for the formalism, and show that it is complete for "Toffoli-Hadamard", the simplest approximately universal fragment of quantum mechanics. We show that the rewriting is terminating, but not confluent (which is expected from the universality of the fragment). We do so using the con…

Lattice dynamics of altermagnetic ruthenium oxide RuO$_{2}$
Surajit Basak, Andrzej Ptok
https://arxiv.org/abs/2403.07609 https://arxi…

Lattice dynamics of altermagnetic ruthenium oxide RuO$_{2}$
Altermagnetic ruthenium oxide RuO$_{2}$ crystallizes with P4$_{2}$/mnm symmetry. Here we discuss the lattice dynamics of this structure. We show and discuss the phonon dispersion and density of states. The phonon dispersion curves contain several Dirac nodal lines and highly degenerate Dirac points. We present the characteristic frequencies and their irreducible representations at the $Γ$ point. Theoretically obtained frequencies of the Raman active modes nicely reproduce the ones reported exp…