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Herr, man beobachtet euch! (Tunichgud, zitiert von Goscinny)

Operator with the Kato property on Banach spaces
Mar Jim\'enez Sevilla, Sebasti\'an Lajara L\'opez, Miguel \'Angel Ruiz Risue\~no
https://arxiv.org/abs/2506.21264 …

Operator with the Kato property on Banach spaces
We consider a class of bounded linear operators between Banach spaces, which we call operators with the Kato property, that includes the family of strictly singular operators between those spaces. We show that if $T:E\to F$ is a dense-range operator with that property and $E$ has a separable quotient, then for each proper dense operator range $R\subset E$ there exists a closed subspace $X\subset E$ such that $E/X$ is separable, $T(X)$ is dense in $F$ and $R+X$ is infinite-codimensional. If $E^*…

Heute vor 57 Jahren: Am 25. Juni 1968 zündeten die USA im Rahmen von Operation #Crosstie die 55. #Atombombe "Sevilla". Crosstie war eine Serie von Tests zwischen 67/68 bei der insgesamt 48 #Kernwaffentests

Very hot weather in Spain today: temperatures above 44°C in five different provinces, with Badajoz at 45.5°C (114F)
Source: aemet.es
#globalwarming #ClimateChange

Run-and-tumble dynamics with non-reciprocal transitions between three velocity states
Julio C. R. Romo-Cruz, Francisco J. Sevilla
https://arxiv.org/abs/2508.10213 https://

Run-and-tumble dynamics with non-reciprocal transitions between three velocity states
We investigate the transport properties of active particles undergoing a three-state run-and-tumble dynamics in one dimension, induced by non-reciprocal transition rates between self-propelling velocity states $\{-v, 0, +v\}$ that explicitly break microscopic reversibility. Departing from conventional reciprocal models, our formulation introduces a minimal yet rich framework for studying non-equilibrium transport driven by internal state asymmetries. Using kinetic Monte Carlo simulations and an…

Frequency subspace encoding for multiplexed quantum secret sharing
Meritxell Cabrejo-Ponce, Christopher Spiess, Carlos Sevilla-Guti\'errez, Fabian Steinlechner
https://arxiv.org/abs/2508.03295

Frequency subspace encoding for multiplexed quantum secret sharing
Quantum secret sharing (QSS) is a multi-party quantum communication protocol that can be realized with bipartite entanglement and relative phase encoding. Previous implementations typically encoded the phase in the pump, applying it across the entire source bandwidth, thereby limiting scalability via wavelength multiplexing. In contrast, we present a variant of the standard QSS protocol that leverages frequency correlations to connect multiple users with a single source. The secret owner, who h…

Gravitational Wave Signals in a Promising Realization of SO(10) Unification
Injun Jeong (Center for Quantum Spacetime, Sogang University, Department of Physics, Sogang University), J\"orn Kersten (Department of Physics and Technology, University of Bergen, Department of Physics and IPAP, Yonsei University), Stefano Scopel (Center for Quantum Spacetime, Sogang University, Department of Physics, Sogang University), Liliana Velasco-Sevilla (Center for Quantum Spacetime, Sogang Univer…

Gravitational Wave Signals in a Promising Realization of SO(10) Unification
We investigate gravitational wave signals in a non-supersymmetric grand unified model where the group $SO(10)$ is broken in two steps to the Standard Model gauge group. We calculate the analytical form of the one-loop effective potential responsible for the first step of symmetry breaking and show that it can lead to a first-order phase transition with gravitational wave production. We also determine the gravitational wave background produced by the primordial plasma of relativistic particles. …

Virtual Laboratories: Domain-agnostic workflows for research
Carlos Sevilla-Salcedo, Armi Tiihonen, Mahsa Asadi, Kevin Sebastian Luck, Aras Umut Erarslan, Arto Klami, Samuel Kaski
https://arxiv.org/abs/2507.06271

Virtual Laboratories: Domain-agnostic workflows for research
Many scientific disciplines have traditionally advanced by iterating over hypotheses using labor-intensive trial-and-error, which is a slow and expensive process. Recent advances in computing, digitalization, and machine learning have introduced tools that promise to make scientific research faster by assisting in this iterative process. However, these advances are scattered across disciplines and only loosely connected, with specific computational methods being primarily developed for narrow d…

🇺🇦 #NowPlaying on #BBC6Music's #TheCraigCharlesFunkAndSoulShow
Sons of Sevilla:
🎵 Butterfly
#SonsofSevilla
https://sonsofsevilla.bandcamp.com/track/butterfly-2
https://open.spotify.com/track/0cs5gga1WsNFSAZ6QyZLQw