Tootfinder

Knallharte Aussage - Schumacher: „Seine Formel-1-Karriere ist beendet!“ #News #Nachrichten

Wollt ihr auch nicht wissen, wie viel Ralf Schumacher wert ist?

Probing microsecond dynamics of disperse nanoparticles at oil-water interfaces using nanometer localization precision total-internal-reflection dark-field microscopy
Anne Y. Schumacher
https://arxiv.org/abs/2507.06238

Probing microsecond dynamics of disperse nanoparticles at oil-water interfaces using nanometer localization precision total-internal-reflection dark-field microscopy
Particles at fluid-fluid interfaces have a wide range of important applications in industry, technology and science. Questions remain about what governs adsorption dynamics and inter-particle interactions, and how mixtures -- both of different-sized particles, and particles and surfactants -- behave. I probe the dynamics of nanoparticles at oil-water interfaces using high-speed total-internal-reflection dark-field (TIR-DF) microscopy, comparing gold particles of diameters 20, 40 and 80 nanomete…

Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities
Jan Wingenbach, Laura Ares, Xuekai Ma, Nai H. Kwong, Jan Sperling, Rolf Binder, Stefan Schumacher
https://arxiv.org/abs/2507.07099

Sensitivity and Topology of Exceptional Rings in Nonlinear Non-Hermitian Planar Optical Microcavities
Non-Hermitian systems hosting exceptional points (EPs) exhibit enhanced sensitivity and unconventional mode dynamics. Going beyond isolated EPs, here we report on the existence of exceptional rings (ERs) in planar optical resonators with specific form of circular dichroism and TE-TM splitting. Such exceptional rings possess intriguing topologies as discussed earlier for condensed matter systems, but they remain virtually unexplored in presence of nonlinearity, for which our photonic platform is…

Ich hatte Hajo Schumacher gar nicht so linksextrem eingeschätzt, dass er so non-chalant Besteuerung von Reichen in die Debatte wirft. Unerhört!
https://mastodon.social/@TwraSun/114578530088057146

Replaced article(s) found for math.FA. https://arxiv.org/list/math.FA/new
[1/1]:
- Keldysh's theorem revisited
Johannes M. Schumacher
…

Earlier this semester I joined "Remnants of Resistance," a podcast by colleagues in CSUN's library and Queer Studies faculty, to talk genetics and queer identity
#LGBTQ #genetics #evolution

On the influence of reference sample properties on magnetic force microscopy calibrations
Baha Sakar, Christopher Habenschaden, Sibylle Sievers, Hans Werner Schumacher
https://arxiv.org/abs/2507.01911

On the influence of reference sample properties on magnetic force microscopy calibrations
Magnetic force microscopy (MFM) allows the characterization of magnetic stray field distributions with high sensitivity and spatial resolution. Based on a suitable calibration procedure, MFM can also yield quantitative magnetic field values. This process typically involves measuring a reference sample to determine the distribution of the tip's stray field or stray field gradient at the sample surface. This distribution is called the tip transfer function (TTF) and is derived through regularized…

🇺🇦 #NowPlaying on BBCRadio3's #ClassicalLive
Johannes Brahms, Andreas Grau, Götz Schumacher & GrauSchumacher Piano Duo:
🎵 Variations on a Theme by Haydn, op. 56b, for two pianos
#JohannesBrahms #AndreasGrau #GötzSchumacher #GrauSchumacherPianoDuo

Scale-resolved turbulent Prandtl number for Rayleigh-B\'{e}nard convection at $\boldsymbol{Pr =10^{-3}}$
Shashwat Bhattacharya, Dmitry Krasnov, Ambrish Pandey, Toshiyuki Gotoh, J\"org Schumacher
https://arxiv.org/abs/2506.22110

Scale-resolved turbulent Prandtl number for Rayleigh-Bénard convection at $\boldsymbol{Pr =10^{-3}}$
We present a framework to calculate the scale-resolved turbulent Prandtl number $Pr_t$ for the well-mixed and highly inertial bulk of a turbulent Rayleigh-Bénard mesoscale convection layer at a molecular Prandtl number $Pr=10^{-3}$. It builds on Kolmogorov's refined similarity hypothesis of homogeneous isotropic fluid and passive scalar turbulence, based on log-normally distributed amplitudes of kinetic energy and scalar dissipation rates that are coarse-grained over variable scales $r$ in the…

Hard Contacts with Soft Gradients: Refining Differentiable Simulators for Learning and Control
Anselm Paulus, A. Ren\'e Geist, Pierre Schumacher, V\'it Musil, Georg Martius
https://arxiv.org/abs/2506.14186

Hard Contacts with Soft Gradients: Refining Differentiable Simulators for Learning and Control
Contact forces pose a major challenge for gradient-based optimization of robot dynamics as they introduce jumps in the system's velocities. Penalty-based simulators, such as MuJoCo, simplify gradient computation by softening the contact forces. However, realistically simulating hard contacts requires very stiff contact settings, which leads to incorrect gradients when using automatic differentiation. On the other hand, using non-stiff settings strongly increases the sim-to-real gap. We analyze …

Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons
Hendrik Rose, Stefan Schumacher, Torsten Meier
https://arxiv.org/abs/2506.22220

Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons
We present a microscopic and fully quantized model to investigate the interaction between semiconductor nanostructures and quantum light fields including the many-body Coloumb interaction between photoexcited electrons and holes. Our approach describes the coupled dynamics of the quantum light field and single and double electron-hole pairs, i.e., excitons and biexcitons, and exactly accounts for Coulomb many-body correlations and carrier band dispersions. Using a simplified yet exact approach,…

Quantum-assisted tracer dispersion in turbulent shear flow
Julia Ingelmann, Fabian Schindler, J\"org Schumacher
https://arxiv.org/abs/2506.14586 https…

Quantum-assisted tracer dispersion in turbulent shear flow
We present a quantum-assisted generative algorithm for synthetic tracks of Lagrangian tracer particles in a turbulent shear flow. The parallelism and sampling properties of quantum algorithms are used to build and optimize a parametric quantum circuit, which generates a quantum state that corresponds to the joint probability density function of the classical turbulent velocity components, p(u_1^{\prime}, u_2^{\prime}, u_3^{\prime}). Velocity samples are drawn by one-shot measurements on the qua…

Three-dimensional velocity gradient statistics in a mesoscale convection laboratory experiment
Prafulla P. Shevkar, Roshan J. Samuel, Christian Cierpka, J\"org Schumacher
https://arxiv.org/abs/2506.13155

Three-dimensional velocity gradient statistics in a mesoscale convection laboratory experiment
We present three-dimensional velocity gradient statistics from Rayleigh--Bénard convection experiments in a horizontally extended cell of aspect ratio 25, a paradigm for mesoscale convection. The Rayleigh number $Ra$ ranges from $3.7 \times 10^5$ to $4.8 \times 10^6$, and the Prandtl number $Pr$ from 5 to 7.1. Spatio-temporally resolved volumetric data are reconstructed from moderately dense Lagrangian particle tracking measurements. All nine components of the velocity gradient tensor from the…