Tootfinder

On Supersymmetric D-brane probes in 4d $\mathcal{N}=2$ $\text{AdS}_2\times\mathbf{S}^2$ Attractors
Alberto Castellano, Carmine Montella, Matteo Zatti
https://arxiv.org/abs/2507.17857

On Supersymmetric D-brane probes in 4d $\mathcal{N}=2$ $\text{AdS}_2\times\mathbf{S}^2$ Attractors
We extend the $κ$-symmetry analysis of supersymmetric D-brane probes in the $\mathrm{AdS}_2 \times \mathbf{S}^2$ attractor geometry, originally performed by Simons, Strominger, Thompson, and Yin, to also include stationary -- but non-static -- worldlines carrying angular momentum along the 2-sphere. We demonstrate that certain special trajectories, with fixed radius and orbital velocity, solve the equations of motion and moreover satisfy a supersymmetry preserving condition, thus defining new …

Euclid preparation: Expected constraints on initial conditions
Collaboration, Finelli, Akrami, Andrews, Ballardini, Casas, Karagiannis, Sakr, Valiviita, Alestas, Bartolo, Bermejo-Climent, Nesseris, Paoletti, Sapone, Tutusaus, Ach\'ucarro, Ca\~nas-Herrera, Jasche, Lavaux, Aghanim, Altieri, Amara, Amendola, Andreon, Auricchio, Baccigalupi, Bagot, Baldi, Bardelli, Battaglia, Biviano, Branchini, Brescia, Camera, Capobianco, Carbone, Carretero, Castellano, Castignani, Cavuoti, Chambers,…

Euclid preparation: Expected constraints on initial conditions
The Euclid mission of the European Space Agency will deliver galaxy and cosmic shear surveys, which will be used to constrain initial conditions and statistics of primordial fluctuations. We present highlights for the Euclid scientific capability to test initial conditions beyond LCDM with the main probes, i.e. 3D galaxy clustering from the spectroscopic survey, the tomographic approach to 3x2pt statistics from photometric galaxy survey, and their combination. We provide Fisher forecasts from t…

Ly$\alpha$ visibility from z = 4.5 to 11 in the UDS field: evidence for a high neutral hydrogen fraction and small ionized bubbles at z $\sim$ 7
L. Napolitano, L. Pentericci, M. Dickinson, P. Arrabal Haro, A. J. Taylor, A. Calabr\`o, A. Bhagwat, P. Santini, F. Arevalo-Gonzalez, R. Begley, M. Castellano, B. Ciardi, C. T. Donnan, D. Dottorini, J. S. Dunlop, S. L. Finkelstein, A. Fontana, M. Giavalisco, M. Hirschmann, I. Jung, A. M. Koekemoer, V. Kokorev, M. Llerena, R. A. Lucas, S. Masci…

Ly$α$ visibility from z = 4.5 to 11 in the UDS field: evidence for a high neutral hydrogen fraction and small ionized bubbles at z $\sim$ 7
The resonant scattering nature of Ly$α$ photons interacting with neutral hydrogen makes Ly$α$-emitting galaxies (LAEs) robust tracers of the intergalactic neutral hydrogen fraction, and thus sensitive probes of cosmic reionization. We present an extensive study of the Ly$α$ evolution from galaxies at 4.5 $\leq$ z $\leq$ 11 in the UDS field, observed as part of the CAPERS survey, and complemented with spectra from the DAWN JWST Archive. The combined sample includes 651 spectroscopically confi…

Euclid VI. NISP-P optical ghosts
Collaboration, Paterson, Schirmer, Okumura, Venemans, Jahnke, Aghanim, Altieri, Amara, Andreon, Baccigalupi, Baldi, Balestra, Bardelli, Battaglia, Biviano, Bonchi, Branchini, Brescia, Brinchmann, Camera, Ca\~nas-Herrera, Capobianco, Carretero, Casas, Castellano, Castignani, Cavuoti, Chambers, Cimatti, Colodro-Conde, Congedo, Conselice, Conversi, Copin, Courbin, Courtois, Da Silva, da Silva, Degaudenzi, De Lucia, Di Giorgio, Dinis, Dole, Dubath, Dupac, D…

Euclid VI. NISP-P optical ghosts
The Near-Infrared Spectrometer and Photometer (NISP) onboard Euclid includes several optical elements in its path, which introduce artefacts into the data from non-nominal light paths. To ensure uncontaminated source photometry, these artefacts must be accurately accounted for. This paper focuses on two specific optical features in NISP's photometric data (NISP-P): ghosts caused by the telescope's dichroic beamsplitter, and the bandpass filters within the NISP fore-optics. Both ghost types exhi…

Abinit 2025: New Capabilities for the Predictive Modeling of Solids and Nanomaterials
Matthieu J. Verstraete, Joao Abreu, Guillaume E. Allemand, Bernard Amadon, Gabriel Antonius, Maryam Azizi, Lucas Baguet, Clementine Barat, Louis Bastogne, Romuald Bejaud, Jean-Michel Beuken, Jordan Bieder, Augustin Blanchet, Francois Bottin, Johann Bouchet, Julien Bouquiaux, Eric Bousquet, James Boust, Fabien Brieuc, Veronique Brousseau-Couture, Nils Brouwer Fabien Bruneval, Alois Castellano, Emmanuel…

Abinit 2025: New Capabilities for the Predictive Modeling of Solids and Nanomaterials
Abinit is a widely used scientific software package implementing density functional theory and many related functionalities for excited states and response properties. This paper presents the novel features and capabilities, both technical and scientific, which have been implemented over the past 5 years. This evolution occurred in the context of evolving hardware platforms, high-throughput calculation campaigns, and the growing use of machine learning to predict properties based on databases o…

On the entropy growth of sums of iid discrete random variables
Riccardo Castellano, Pavel Sekatski
https://arxiv.org/abs/2508.05348 https://arxiv.org/pdf/2…

On the entropy growth of sums of iid discrete random variables
We derive an asymptotic lower bound on the Shannon entropy $H$ of sums of $N$ arbitrary iid discrete random variables. The derived bound $H \geq \frac{r(X)}{2}\log(N) + {\it cst}$ is given in terms of the incommensurability rank $r(X)$ of the random variable -- a positive integer quantity that we introduce. The derivation does not rely on central limit theorems, but builds upon the known expressions of the asymptotic entropy of the multinomial distribution and sums of iid lattice random variabl…

URGENT ACTION: Wir fordern Schutz für das Team des Menschenrechtszentrums Frayba!
https://netz-der-rebellion.org/2025/07/26/urgent-action-wir-fordern-schutz-fuer-das-team-des-menschenrechtszentrums-frayba/

URGENT ACTION: Wir fordern Schutz für das Team des Menschenrechtszentrums Frayba! - Netz der Rebellion
*Castellano* Erneuter Einschüchterungsversuch gegen das Menschenrechtszentrum Frayba in San Cristóbal de Las Casas, Chiapas Am Abend des 22. Juli 2025 wurde die […]

Geometric invariants of TDLC completions
Ilaria Castellano, Jos\'e Pedro Quintanilha
https://arxiv.org/abs/2507.01639 https://arx…

Geometric invariants of TDLC completions
Recently, Bonn and Sauer showed that, from the point of view of compactness properties, the Schlichting completion of a Hecke pair $(Γ,Λ)$ behaves precisely as if it were the quotient of $Γ$ by $Λ$. Motivated by this result, we prove that a similar phenomenon holds for the $Σ$-sets. More generally, we relate the $Σ$-sets of every TDLC completion of a Hecke pair $(Γ,Λ)$ to the $Σ$-sets of $Γ$ whenever $Λ$ satisfies suitable compactness properties. We provide applications to TDLC compl…

Euclid: Methodology for derivation of IPC-corrected conversion gain of nonlinear CMOS APS
J. Le Graet, A. Secroun, M. Tourneur-Silvain, W. Gillard, N. Fourmanoit, S. Escoffier, E. Kajfasz, S. Kermiche, B. Kubik, J. Zoubian, S. Andreon, M. Baldi, S. Bardelli, P. Battaglia, D. Bonino, E. Branchini, M. Brescia, J. Brinchmann, A. Caillat, S. Camera, V. Capobianco, C. Carbone, J. Carretero, S. Casas, M. Castellano, G. Castignani, S. Cavuoti, A. Cimatti, C. Colodro-Conde, G. Congedo, C. J. C…

Euclid: Methodology for derivation of IPC-corrected conversion gain of nonlinear CMOS APS
We introduce a fast method to measure the conversion gain in Complementary Metal-Oxide-Semiconductors (CMOS) Active Pixel Sensors (APS), which accounts for nonlinearity and interpixel capacitance (IPC). The standard 'mean-variance' method is biased because it assumes pixel values depend linearly on signal, and existing methods to correct for nonlinearity are still introducing significant biases. While current IPC correction methods are prohibitively slow for a per-pixel application, our new met…

"Who Should I Believe?": User Interpretation and Decision-Making When a Family Healthcare Robot Contradicts Human Memory
Hong Wang, Natalia Calvo-Barajas, Katie Winkle, Ginevra Castellano
https://arxiv.org/abs/2506.21322

"Who Should I Believe?": User Interpretation and Decision-Making When a Family Healthcare Robot Contradicts Human Memory
Advancements in robotic capabilities for providing physical assistance, psychological support, and daily health management are making the deployment of intelligent healthcare robots in home environments increasingly feasible in the near future. However, challenges arise when the information provided by these robots contradicts users' memory, raising concerns about user trust and decision-making. This paper presents a study that examines how varying a robot's level of transparency and sociabilit…

Witnessing downsizing in the making: quiescent and breathing galaxies at the dawn of the Universe
Emiliano Merlin, Flaminia Fortuni, Antonello Calabr\'o, Marco Castellano, Paola Santini, Adriano Fontana, Lucas C. Kimmig, Francesco Shankar, Lorenzo Napolitano, Anton M. Koekemoer, Ray A. Lucas, Fabio Pacucci, Michael C. Cooper, Michaela Hirschmann, Pablo G. P\'erez-Gonz\'alez, Guillermo Barro, Mark Dickinson, Giovanni Gandolfi, Norman A. Grogin, Xin Wang

Witnessing downsizing in the making: quiescent and breathing galaxies at the dawn of the Universe
[Shortened for arXiv] We conduct a systematic search for $\log(M_\ast/M_\odot) \geq 9.5$ quiescent galaxies at $z > 3$ in six extragalactic deep fields observed with NIRCam, with the goal of extracting their physical and statistical features in a uniform and self-consistent manner. We exploit the ASTRODEEP-JWST photometric catalogs to single out robust candidates, including sources quenched only a few tens of Myr before the observation. We apply a SED-fitting procedure which explores three func…

Modeling and benchmarking quantum optical neurons for efficient neural computation
Andrea Andrisani, Gennaro Vessio, Fabrizio Sgobba, Francesco Di Lena, Luigi Amato Santamaria, Giovanna Castellano
https://arxiv.org/abs/2509.01784

Modeling and benchmarking quantum optical neurons for efficient neural computation
Quantum optical neurons (QONs) are emerging as promising computational units that leverage photonic interference to perform neural operations in an energy-efficient and physically grounded manner. Building on recent theoretical proposals, we introduce a family of QON architectures based on Hong-Ou-Mandel (HOM) and Mach-Zehnder (MZ) interferometers, incorporating different photon modulation strategies -- phase, amplitude, and intensity. These physical setups yield distinct pre-activation functio…

A Pristine Star-Forming Complex at z=4.19
E. Vanzella, M. Messa, A. Zanella, A. Bolamperti, M. Castellano, F. Loiacono, P. Bergamini, G. Roberts-Borsani, A. Adamo, A. Fontana, T. Treu, F. Calura, C. Grillo, M. Lombardi, P. Rosati, R. Gilli, M. Meneghetti
https://arxiv.org/abs/2509.07073

A Pristine Star-Forming Complex at z=4.19
We report the discovery of a faint (M_1700 ~ -12.2), oxygen-deficient strongly-lensed ionizing source -- dubbed LAP2 (Lensed And Pristine 2) -- at a spectroscopic redshift of z=4.19. LAP2 appears to be isolated and lies very close to the caustic produced by the lensing galaxy cluster Abell 2744. It was observed with the James Webb Space Telescope (JWST) NIRSpec MSA in prism mode as part of the UNCOVER program. The NIRSpec spectrum reveals prominent Lya emission (7.1 sigma), clear Ha emission (6…

Investigation of a two-patch within-host model of hepatitis B viral infection
Keoni Castellano, Omar Saucedo, Stanca M. Ciupe
https://arxiv.org/abs/2507.23038 https://

Investigation of a two-patch within-host model of hepatitis B viral infection
Chronic infection with hepatitis B virus (HBV) can lead to formation of abnormal nodular structures within the liver. To address how changes in liver anatomy affect overall virus-host dynamics, we developed within-host ordinary differential equation models of two-patch hepatitis B infection, one that assumes irreversible and one that assumes reversible movement between nodular structures. We investigated the models analytically and numerically, and determined the contribution of patch susceptib…

Mysteries of Capotauro - investigating the puzzling nature of an extreme F356W-dropout
Giovanni Gandolfi, Giulia Rodighiero, Marco Castellano, Adriano Fontana, Paola Santini, Mark Dickinson, Steven Finkelstein, Michele Catone, Antonello Calabr\`o, Emiliano Merlin, Laura Pentericci, Laura Bisigello, Andrea Grazian, Lorenzo Napolitano, Benedetta Vulcani, Anthony J. Taylor, Pablo Arrabal Haro, Allison Kirkpatrick, Bren E. Backhaus, Benne W. Holwerda, Marika Giulietti, Nikko J. Cleri, Eman…

Mysteries of Capotauro - investigating the puzzling nature of an extreme F356W-dropout
JWST has uncovered a diverse population of extreme near-infrared dropouts, including ultra high-redshift ($z>15$) galaxy candidates, dust-obscured galaxies challenging dust production theories, sources with strong Balmer breaks - possibly compact AGN in dense environments - and cold, sub-stellar Galactic objects. This work presents Capotauro, a F356W-dropout in the CEERS survey with F444W AB magnitude of $\sim27.68$ and a sharp $>3$ mag flux drop between $3.5{-}4.5\,μ$m, undetected below $3.5\…