Tootfinder

Configurations in the Euclidean plane associated to a system of equations
Francesco Colangelo
https://arxiv.org/abs/2506.14773 https://

Configurations in the Euclidean plane associated to a system of equations
In the Euclidean plane ${\bf{E}}^2$, fix four pairwise distinct points \begin{equation*} %\label{eqA} \begin{array}{ccc} A=(a_1,a_2),\ B=(b_1,b_2),\ C=(c_1,c_2),\ D=(d_1,d_2), \end{array} \end{equation*} together with four non-zero real numbers $k_A,k_B,k_C,k_D$. We show that System (*) consisting of the following four equations in the unknowns $X=(x_1,x_2)$ and $Y=(y_1,y_2)$ \begin{equation*} %\label{egy} \frac{1}{\|X-T\|^2} +\frac{1}{\|Y-T\|^2}=k_T, \quad T\in\{A,B,C,D\} \…

The Orbit of WASP-4 b is in Decay
\"O. Ba\c{s}t\"urk, A. C. Kutluay, A. Barker, S. Yal\c{c}{\i}nkaya, J. Southworth, K. Barkaoui, A. W\"unsche, M. J. Burgdorf, M. Timmermans, E. Jehin, J. Tregloan-Reed, R. Figuera Jaimes, T. C. Hinse, B. Duru, J. Hitchcock, P. Longa-Pe\~na, S. Rahvar, S. Sajadian, M. Bretton, S. O. Selam, M. Gillon, M. Bonavita, G. D'Ago, M. Dominik, U. G. J{\o}rgensen, C. Snodgrass, P. Spyrato

The Orbit of WASP-4 b is in Decay
WASP-4 b is a hot Jupiter exhibiting a decreasing orbital period, prompting investigations into potential mechanisms driving its evolution. We analyzed 173 transit light curves, including 37 new observations, and derived mid-transit timings with EXOFAST, forming the most extensive TTV dataset for this system. Adding 58 literature timings and removing unreliable data, we constructed a TTV diagram with 216 points. Our analysis considered linear, quadratic, and apsidal motion models, with the quad…

The MUSE view of the Sculptor galaxy: survey overview and the planetary nebulae luminosity function
E. Congiu, F. Scheuermann, K. Kreckel, A. Leroy, E. Emsellem, F. Belfiore, J. Hartke, G. Anand, O. V. Egorov, B. Groves, T. Kravtsov, D. Thilker, C. Tovo, F. Bigiel, G. A. Blanc, A. D. Bolatto, S. A. Cronin, D. A. Dale, R. McClain, J. E. M\'endez-Delgado, E. K. Oakes, R. S. Klessen, E. Schinnerer, T. G. Williams

The MUSE view of the Sculptor galaxy: survey overview and the planetary nebulae luminosity function
NGC 253, the Sculptor galaxy, is the southern, massive, star-forming disk galaxy closest to the Milky Way. In this work, we present a new 103-pointing MUSE mosaic of this galaxy covering the majority of its star-forming disk up to 0.75xR25. With an area of ~20x5 arcmin2 (~20x5 kpc2, projected) and a physical resolution of ~15 pc, this mosaic constitutes one of the largest, highest physical resolution integral field spectroscopy surveys of any star-forming galaxy to date. Here, we exploit the mo…

Study of a giant Large Magellanic Cloud Supernova Remnant, Veliki (J0450.4-7050)
Z. J. Smeaton, M. D. Filipovi\'c, R. Z. E. Alsaberi, B. Arbutina, W. D. Cotton, E. J. Crawford, A. M. Hopkins, R. Kothes, D. Leahy, J. L. Payne, N. Rajabpour, H. Sano, M. Sasaki, D. Uro\v{s}evi\'c, J. Th. van Loon
https://arxiv.org/abs/2506.…

Study of a giant Large Magellanic Cloud Supernova Remnant, Veliki (J0450.4-7050)
We present a high-resolution radio-continuum view and a multi-frequency analysis of the Large Magellanic Cloud (LMC) Supernova Remnant (SNR) J0450.4-7050, which we give the nickname Veliki. These high-resolution observations reveal a larger extent than previously measured, making J0450.4-7050 one of the largest SNRs that we know of. Additionally, we observe a higher than expected radio surface brightness and an unusually flat spectral index ($α= -0.26 \pm 0.02$), with little spectral variation…

Annihilating and breaking Lorentz cone entanglement
Francesca La Piana, Alexander M\"uller-Hermes
https://arxiv.org/abs/2506.14480 https://

Annihilating and breaking Lorentz cone entanglement
Linear maps between finite-dimensional ordered vector spaces with orders induced by proper cones $C_A$ and $C_B$ are called entanglement breaking if their partial application sends the maximal tensor product $K\otimes_{\max} C_A$ into the minimal tensor product $K\otimes_{\min} C_B$ for any proper cone $K$. We study the larger class of Lorentz-entanglement breaking maps where $K$ is restricted to be a Lorentz cone of any dimension, i.e., any cone over a Euclidean ball. This class of maps appear…

Measurement of the photosphere oblateness of $\gamma$ Cassiopeiae via Stellar Intensity Interferometry with the VERITAS Observatory
A. Archer, J. P. Aufdenberg, P. Bangale, J. T. Bartkoske, W. Benbow, J. H. Buckley, Y. Chen, N. B. Y. Chin, J. L. Christiansen, A. J. Chromey, A. Duerr, M. Escobar Godoy, S. Feldman, Q. Feng, S. Filbert, L. Fortson, A. Furniss, W. Hanlon, O. Hervet, C. E. Hinrichs, J. Holder, Z. Hughes, T. B. Humensky, W. Jin, M. N. Johnson, M. Kertzman, M. Kherlakian, D. …

Measurement of the photosphere oblateness of $γ$ Cassiopeiae via Stellar Intensity Interferometry with the VERITAS Observatory
We use the stellar intensity interferometry system implemented with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) at Fred Lawrence Whipple Observatory (FLWO) as a light collector to obtain measurements of the rapid rotator star $γ$ Cassiopeiae, at a wavelength of 416 nm. Using data from baselines sampling different position angles, we extract the size, oblateness, and projected orientation of the photosphere. Fitting the data with a uniform ellipse model yields a minor-…

Ambiguities in the Partial-Wave Analysis of the Photoproduction of Pairs of Pseudoscalar Mesons
J. Guo, E. Barriga, K. Scheuer, A. Austregesilo, P. Eugenio, D. I. Glazier, B. Grube, W. Imoehl, C. A. Meyer, A. Ostrovidov, J. R. Stevens
https://arxiv.org/abs/2506.15128

Ambiguities in the Partial-Wave Analysis of the Photoproduction of Pairs of Pseudoscalar Mesons
Applying the technique of partial-wave analysis, there are cases where more than one set of underlying complex-valued amplitudes can describe the measured observables. These ambiguities can sometimes be resolved using additional information, but assumptions are often required. It is known that the partial-wave analysis of two-pseudoscalar meson systems produced in photoproduction with a linearly polarized photon beam is free from discrete ambiguities stemming from the Barrelet zeros when the nu…

On generalised Pythagorean triples over number fields
Pedro-Jos\'e Cazorla Garc\'ia
https://arxiv.org/abs/2506.11636 https://…

On generalised Pythagorean triples over number fields
Generalised Pythagorean triples are integer tuples $(x,y,z)$ satisfying the equation $E_{a,b,c}: ax^2+by^2+cz^2=0$. A significant amount of research has been devoted towards understanding generalised Pythagorean triples and, in particular, we can now determine whether $E_{a,b,c}$ has solutions and find them in a computationally effective manner. In this paper, we consider an extension of generalised Pythagorean triples to number fields $K$. In particular, we survey and extend the existing res…

Improved Image Reconstruction and Diffusion Parameter Estimation Using a Temporal Convolutional Network Model of Gradient Trajectory Errors
Jonathan B. Martin, Hannah E. Alderson, John C. Gore, Mark D. Does, Kevin D. Harkins
https://arxiv.org/abs/2506.14995

Improved Image Reconstruction and Diffusion Parameter Estimation Using a Temporal Convolutional Network Model of Gradient Trajectory Errors
Summary: Errors in gradient trajectories introduce significant artifacts and distortions in magnetic resonance images, particularly in non-Cartesian imaging sequences, where imperfect gradient waveforms can greatly reduce image quality. Purpose: Our objective is to develop a general, nonlinear gradient system model that can accurately predict gradient distortions using convolutional networks. Methods: A set of training gradient waveforms were measured on a small animal imaging system, and used …

Overdense fireworks in GOODS-N: Unveiling a record number of massive dusty star forming galaxies at z$\sim$5.2 with the N2CLS
G. Lagache, M. Xiao, A. Beelen, S. Berta, L. Ciesla, R. Neri, R. Pello, R. Adam, P. Ade, H. Ajeddig, S. Amarantidis, P. Andr\'e, H. Aussel, A. Beno\^it, M. B\'ethermin, L. -J. Bing, A. Bongiovanni, J. Bounmy, O. Bourrion, M. Calvo, A. Catalano, D. Ch\'erouvrier, U. Chowdhury, M. De Petris, F. -X. D\'esert, S. Doyle, E. F. C. Driessen, G. Ejlali, …

Overdense fireworks in GOODS-N: Unveiling a record number of massive dusty star forming galaxies at z$\sim$5.2 with the N2CLS
As part of the N2CLS Survey, we have identified a remarkable overdensity of ten bright dusty star-forming galaxies at z$\sim$5.2 in the GOODS-N field. Three of these galaxies, N2GN_1_01, 06, and 23 (known as GN10, HDF850.1, and S3, respectively), had previously been spectroscopically confirmed as members of the exceptional large-scale structure at z$\sim$5.1-5.3, which is notably elongated along the line of sight, spanning 30 cMpc. We present the spectroscopic confirmation of N2GN_1_13 at z$_{\…

Revised $B(E2; 2^{ }_{1} \rightarrow 0^{ }_{1})$ value in the semi-magic nucleus $^{210}$Pb
C. M. Nickel, V. Werner, G. Rainovski, P. R. John, M. Beckers, D. Bittner, A. Blazhev, A. Esmaylzadeh, C. Fransen, J. Garbe, L. Gerhard, K. Geusen, K. Gladnishki, A. Goldkuhle, K. E. Ide, J. Jolie, V. Karayonchev, R. Kern, E. Kleis, L. Kl\"ockner, D. Kocheva, M. Ley, H. Mayr, N. Pietralla, F. von Spee, M. Steffan, T. Stetz, J. Wiederhold

Revised $B(E2; 2^{+}_{1} \rightarrow 0^{+}_{1})$ value in the semi-magic nucleus $^{210}$Pb
The lifetime of the $2^+_1$ state of $^{210}$Pb was measured in the $^{208}$Pb($^{18}$O, $^{16}$O)$^{210}$Pb two-neutron transfer reaction by $γ$-ray spectroscopy employing the recoil-distance Doppler-shift method. The extracted absolute $B(E2)$$\downarrow$ value of ${119\;^{+\;9}_{-\;8}\;\hspace{-0pt}\,\text{e}^2\text{fm}^4}$ is consistent with previously reported measurements, but with significantly improved precision. The available experimental data for the $2^+_1$-$4^+_1$-$6^+_1$-$8^+_1$ m…

Cyclically sheared colloidal gels: structural change and delayed failure time
Himangsu Bhaumik, James E. Hallett, Tanniemola B. Liverpool, Robert L. Jack, C. Patrick Royall
https://arxiv.org/abs/2506.14408

Cyclically sheared colloidal gels: structural change and delayed failure time
We present experiments and simulations on cyclically sheared colloidal gels, and probe their behaviour on several different length scales. The shearing induces structural changes in the experimental gel, changing particles' neighborhoods and reorganizing the mesoscopic pores. These results are mirrored in computer simulations of a model gel-former, which show how the material evolves down the energy landscape under shearing, for small strains. By systematic variation of simulation parameters, w…

Performance of the image persistence model for Euclid infrared detectors
B. Kubik, R. Barbier, G. Smadja, S. Ferriol, Y. Conseil, Y. Copin, W. Gillard, S. Dusini, K. Jahnke, E. Prieto, N. Auricchio, E. Balbi, A. Balestra, P. Battaglia, V. Capobianco, R. Chary, L. Corcione, F. Cogato, G. Delucchi, E. Franceschi, L. Gabarra, F. Gianotti, F. Grupp, E. Lentini, S. Ligori, E. Medinaceli, G. Morgante, K. Paterson, E. Romelli, L. Sauniere, M. Schirmer, C. Sirignano G. Testera, M. Trifoglio, A. Troja, L. Valenziano, M. Frailis, M. Scodeggio, J. -C. Barriere, M. Berthe, C. Bodendorf, A. Caillat, M. Carle, R. Casas, H. Cho, A. Costille, F. Ducret, B. Garilli, W. Holmes, F. Hormuth, A. Hornstrup, M. Jhabvala, R. Kohley, D. Le Mignant, P. B. Lilje, I. Lloro, C. Padilla, G. Polenta, J. -C. Salvignol, G. Seidel, B. Serra, A. Secroun, L. Stanco, R. Toledo-Moreo, S. Anselmi, E. Borsato, L. Caillat, C. Colodro-Conde, V. Conforti, J. E. Davies, A. Renzi, F. Dal Corso, S. Davini, A. Derosa, J. J. Diaz, S. Di Domizio, D. Di Ferdinando, R. Farinelli, A. G. Ferrari, F. Fornari, F. Giacomini, O. Krause, F. Laudisio, J. Macias-Perez, J. Marpaud, N. Mauri, R. da Silva, M. Niclas, F. Passalacqua, I. Risso, P. Lagier, A. N. Sorensen, P. Stassi, J. Steinwagner, M. Tenti, C. Thizy, S. Tosi, R. Travaglini, O. Tubio, C. Valieri, S. Ventura, C. Vescovi, J. Zoubian
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Multipartite Mixed-Species Entanglement over a Quantum Network
D. Main, P. Drmota, E. M. Ainley, A. Agrawal, D. Webb, S. Saner, O. Bazavan, B. C. Nichol, R. Srinivas, D. P. Nadlinger, G. Araneda, D. M. Lucas
https://arxiv.org/abs/2506.14334

Multipartite Mixed-Species Entanglement over a Quantum Network
We generate multipartite entangled states of two, three and four matter qubits, where the entanglement is distributed over macroscopic distances via a photonic network link. Trapped-ion ${}^{88}\text{Sr}^+$ qubits are entangled directly via the optical fibre link, and the entanglement is subsequently extended to ${}^{43}\text{Ca}^+$ memory qubits co-trapped in each network node, using local mixed-species logic gates. We create remotely entangled $\text{Sr}^+$-$\text{Ca}^+$ and $\text{Ca}^+$-$\t…

Cardinalities in proofreading
Martin Klazar
https://arxiv.org/abs/2506.11358 https://arxiv.org/pdf/2506.11358

Cardinalities in proofreading
In 1975, G. Pólya pointed out that if two proofreaders found $a$, resp. $b$, errors in text, and both found $c$ errors, then the unknown number $e$ of all errors is approximated by $e\approx\frac{ab}{c}$. We devise a realistic combinatorial model of Pólya's result and estimate its performance by the Probabilistic Method.

Euclid: The potential of slitless infrared spectroscopy: A z=5.4 quasar and new ultracool dwarfs
E. Ba\~nados, V. Le Brun, S. Belladitta, I. Momcheva, D. Stern, J. Wolf, M. Ezziati, D. J. Mortlock, A. Humphrey, R. L. Smart, S. L. Casewell, A. P\'erez-Garrido, B. Goldman, E. L. Mart\'in, A. Mohandasan, C. Reyl\'e, C. Dominguez-Tagle, Y. Copin, E. Lusso, Y. Matsuoka, K. McCarthy, F. Ricci, H. -W. Rix, H. J. A. Rottgering, J. -T. Schindler, J. R. Weaver, A. Allaoui, T. Bedrine…

Euclid: The potential of slitless infrared spectroscopy: A z=5.4 quasar and new ultracool dwarfs
We demonstrate the potential of Euclid's slitless spectroscopy to discover high-redshift (z>5) quasars and their main photometric contaminant, ultracool dwarfs. Sensitive infrared spectroscopy from space is able to efficiently identify both populations, as demonstrated by Euclid Near-Infrared Spectrometer and Photometer Red Grism (NISP RGE) spectra of the newly discovered z=5.404 quasar EUCL J181530.01+652054.0, as well as several ultracool dwarfs in the Euclid Deep Field North and the Euclid E…

Multiplicity of young isolated planetary mass objects in Taurus and Upper Scorpius
H. Bouy, G. Duch\^ene, G. Strampelli, J. Aguilar, J. Olivares, D. Barrado, S. N. Raymond, N. Hu\'elamo, M. Tamura, E. Bertin, W. Brandner, J. -C. Cuillandre, P. A. B. Galli, N. Miret-Roig
https://arxiv.org/abs/2506.14380

Multiplicity of young isolated planetary mass objects in Taurus and Upper Scorpius
Free-floating planetary mass objects-worlds that roam interstellar space untethered to a parent star-challenge conventional notions of planetary formation and migration, but also of star and brown dwarf formation. We focus on the multiplicity among free-floating planets. By virtue of their low binding energy (compared to other objects formed in these environments), these low-mass substellar binaries represent a most sensitive probe of the mechanisms at play during the star formation process. We…

Charge Pickup Reaction Cross Section for Neutron-Rich p-Shell Isotopes at 900A MeV
J. -C. Zhang, B. -H. Sun, I. Tanihata, S. Terashima, F. Wang, R. Kanungo, C. Scheidenberger, F. Ameil, J. Atkinson, Y. Ayyad, S. Bagchi, D. Cortina-Gil, I. Dillmann, A. Estrad\'e, A. Evdokimov, F. Farinon, H. Geissel, G. Guastalla, R. Janik, S. Kaur, R. Kn\"obel, J. Kurcewicz, Yu. A. Litvinov, M. Marta, M. Mostazo, I. Mukha, C. Nociforo, H. J. Ong, S. Pietri, A. Prochazka, B. Sitar, P. Strmen, M…

Charge Pickup Reaction Cross Section for Neutron-Rich p-Shell Isotopes at 900A MeV
We report charge pickup reaction cross sections for 24 \textit{p}-shell isotopes, including $^{8,9}$Li, $^{10-12}$Be, $^{10,13-15}$B, $^{12,14-19}$C and $^{14,15,17-22}$N, measured at relativistic energies (approximately 900$A$ MeV) on both hydrogen and carbon targets. For the first time, we reveal a universal rapid increase in the charge pickup cross sections of unstable projectiles with isospin asymmetry along several isotopic chains. The cross sections can be decoupled into distinct contribu…

A Generalization of a Classical Geometric Extremum Problem
Petar Kenderov, Oleg Mushkarov, Nikolai Nikolov
https://arxiv.org/abs/2506.07252 https://…

A Generalization of a Classical Geometric Extremum Problem
Let $\partial \,\mathcal{C}$ be the boundary of a compact convex body $\mathcal{C}$ in $\mathbb{R}^n,\, n\geq 2$, and $O$ be an interior point of $\mathcal C$. Every straight line $l$ containing $O$ cuts from $\mathcal{C}$ a segment $[AB]$ with end-points on $\partial \,\mathcal{C}$. It is shown that if $[AB]$ is the shortest such segment, then $\partial \,\mathcal{C}$ is smooth at the points $A$ and $ B$ (i.e. at both of them there is only one supporting hyperplane for $\mathcal{C}$) and, some…

Runaway electron-induced plasma facing component damage in tokamaks
S. Ratynskaia, M. Hoelzl, E. Nardon, P. Aleynikov, F. J. Artola, V. Bandaru, M. Beidler, B. Breizman, D. del-Castillo-Negrete, M. De Angeli, V. Dimitriou, R. Ding, J. Eriksson, O. Ficker, R. S. Granetz, E. Hollmann, M. Hoppe, M. Houry, I. Jepu, H. R. Koslowski, C. Liu, J. R. Martin-Solis, G. Pautasso, Y. Peneliau, R. A. Pitts, G. I. Pokol, C. Reux, U. Sheikh, S. A. Silburn, T. Tang, R. A. Tinguely, P. Tolias, E. Tomeso…

Runaway electron-induced plasma facing component damage in tokamaks
This Roadmap article addresses the critical and multifaceted challenge of plasma-facing component (PFC) damage caused by runaway electrons (REs) in tokamaks, a phenomenon that poses a significant threat to the viability and longevity of future fusion reactors such as ITER and DEMO. The dramatically increased RE production expected in future high-current tokamaks makes it difficult to avoid or mitigate REs when a plasma discharge terminates abnormally. Preventing damage from the intense localise…

A Reassessment of the Pantheon and DES 5YR Calibration Uncertainties: Dovekie
B. Popovic, W. D. Kenworthy, M. Ginolin, A. Goobar, P. Shah, B. M. Boyd, A. Do, D. Brout, D. Scolnic, M. Vincenzi, S. Dhawan, D. O. Jones, M. Smith, M. Rigault, B. Racine, E. E. Hayes, R. Chen, P. Wiseman, L. Galbany, M. Grayling, L. LaCroix, C. Barjou-Delayre, D. Kuhn, C. Lemon

A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
Type Ia Supernovae (SNe Ia) are crucial tools to measure the accelerating expansion of the universe, comprising thousands of SNe across multiple telescopes. Accurate measurements of cosmological parameters with SNe Ia require a robust understanding and cross-calibration of the telescopes and filters. A previous cross-calibration effort, 'Fragilistic', provided 25 photometric systems, but offered no public code or ability to add new surveys. We provide an open-source cross-calibration solution, …

Cryogenic systems for the TUCAN EDM experiment
Jeffery W. Martin, B. Algohi, D. Anthony, L. Barr\'on-Palos, M. Bradley, A. Brossard, T. Bui, J. Chak, C. Davis, R. de Vries, K. Drury, D. Fujimoto, R. Fujitani, M. Gericke, P. Giampa, R. Golub, T. Hepworth, T. Higuchi, G. Ichikawa, S. Imajo, A. Jaison, B. Jamieson, M. Katotoka, S. Kawasaki, M. Kitaguchi, W. Klassen, E. Korkmaz, E. Korobkina, M. Lavvaf, T. Lindner, N. Lo, S. Longo, K. Madison, Y. Makida, J. Malcolm, J. Mammei, R. Mamme…

Cryogenic systems for the TUCAN EDM experiment
The TUCAN (TRIUMF UltraCold Advanced Neutron) Collaboration is completing a new ultracold neutron (UCN) source. The UCN source will deliver UCNs to a neutron electric dipole moment (EDM) experiment. The EDM experiment is projected to be capable of an uncertainty of $1\times 10^{-27}~e$cm, competitive with other planned projects, and a factor of ten more precise than the present world's best. The TUCAN source is based on a UCN production volume of superfluid helium (He-II), held at 1~K, and coup…

P O S I T A N O B Y
J O H N S T E I N B E C K
"I first heard of Positano from Alberto Moravia. It was very hot in Rome. He said, “Why don’t you go down to Positano on the Amalfi Coast? It is one of the fine places of Italy”. Later John McKnight of United States Information Service told me the same thing. He had spent a year there working on a book. Half a dozen people echoed this. Positano kind of moved in on us and we found ourselves driving down to Naples on our way."…

Challenging Spontaneous Quantum Collapse with XENONnT
E. Aprile, J. Aalbers, K. Abe, S. Ahmed Maouloud, L. Althueser, B. Andrieu, E. Angelino, D. Ant\'on Martin, S. R. Armbruster, F. Arneodo, L. Baudis, M. Bazyk, L. Bellagamba, R. Biondi, A. Bismark, K. Boese, A. Brown, G. Bruno, R. Budnik, C. Cai, C. Capelli, J. M. R. Cardoso, A. P. Cimental Ch\'avez, A. P. Colijn, J. Conrad, J. J. Cuenca-Garc\'ia, C. Curceanu, V. D'Andrea, L. C. Daniel Garcia, M. P. Decowski, A. Deist…

Challenging Spontaneous Quantum Collapse with XENONnT
We report on the search for X-ray radiation as predicted from dynamical quantum collapse with low-energy electronic recoil data in the energy range of 1-140 keV from the first science run of the XENONnT dark matter detector. Spontaneous radiation is an unavoidable effect of dynamical collapse models, which were introduced as a possible solution to the long-standing measurement problem in quantum mechanics. The analysis utilizes a model that for the first time accounts for cancellation effects i…

Magnetic phases and zone-folded phonons in a frustrated van der Waals magnet
A. Pawbake, F. Petot, F. Le Mardel\'e, T. Riccardi, J. L\'ev\^eque, B. A. Piot, M. Orlita, J. Coraux, M. Hubert, J. Dzian, M. Veis, Y. Skourski, B. Wu, Z. Sofer, B. Gr\'emaud, A. Sa\'ul, C. Faugeras
https://arxiv.org/abs/2506.09680

Magnetic phases and zone-folded phonons in a frustrated van der Waals magnet
2D magnetic materials have attracted extensive research interest due to their potential application in nanospintronics, optospintronics, and in magnonics. Ferromagnetic as well as antiferromagnetic layered materials have been demonstrated and successfully inserted into van der Waals heterostructures. However, the effects of magnetic frustration in van der Waals materials and the possibilities offered by spin configurations characterized by nonlinear spin arrangements have not been fully conside…

$\mathrm{^{117m}Sn}$ and $\mathrm{^{119m}Te}$ Production via Proton Bombardment on Natural Antimony and Implications for Modeling Charged Particle Reactions
Catherine E. Apgar, Andrew S. Voyles, Jon C. Batchelder, Cathy S. Cutler, Morgan B. Fox, Yun-Hsuan Lee, Dmitri G. Medvedev, Jonathan T. Morrell, Ellen M. O'Brien, Michael Skulski, C. Etienne Vermeulen, Lee A. Bernstein

$\mathrm{^{117m}Sn}$ and $\mathrm{^{119m}Te}$ Production via Proton Bombardment on Natural Antimony and Implications for Modeling Charged Particle Reactions
$\mathrm{^{117m}Sn}$ and $\mathrm{^{119}Sb}$, the latter of which is produced via a $\mathrm{^{119m}Te}$ generator, are promising radionuclides for the targeted treatment of both osteoarthritis and small mass tumors via Auger therapy. Experiments were conducted at Lawrence Berkeley National Laboratory, Los Alamos National Laboratory, and Brookhaven National Laboratory to measure the $\mathrm{^{nat}Sb}$(p,x)$\mathrm{^{117m}Sn}$ and $\mathrm{^{nat}Sb}$(p,x)$\mathrm{^{119m}Te}$ cross sections for …

Search for very-high-energy photon clusters and transients outside the galactic plane in the Fermi-LAT data
M. S. Pshirkov, A. S. Kovankin
https://arxiv.org/abs/2506.12833

Search for very-high-energy photon clusters and transients outside the galactic plane in the Fermi-LAT data
We present a search for spatio-temporal clusters in 16 years of Fermi-LAT very high-energy (VHE; $E>100$ GeV) data using the DBSCAN algorithm, focusing on high Galactic latitude ($|b|>10^{\circ}$) clusters with $\geq5$ events and transient doublets (two events within $\leq 3$ days). Of 107 detected clusters, two correspond to previously unidentified VHE sources: weak BL Lacertae objects 4FGL J0039.1-2219 and 4FGL J0212.2-0219, promising targets for next-generation VHE observatories. D…

A Categorical Perspective on Braid Representations
P. P. Martin, E. C. Rowell, F. Torzewska
https://arxiv.org/abs/2506.07950 https://…

A Categorical Perspective on Braid Representations
We study categories whose objects are the braid representations, that is, strict monoidal functors from the braid category $B$ to the category of matrices $Mat$. Braid representations are equivalent to solutions to the (constant) Yang-Baxter equation. So their classification problems are also equivalent. We consider both the categories $MoonFun(B,Mat)$ whose morphisms are natural transformations and the category $MonFun(B,Mat)$ whose morphisms are the monoidal natural transformations. This cate…

Repeated ancilla reuse for logical computation on a neutral atom quantum computer
J. A. Muniz, D. Crow, H. Kim, J. M. Kindem, W. B. Cairncross, A. Ryou, T. C. Bohdanowicz, C. -A. Chen, Y. Ji, A. M. W. Jones, E. Megidish, C. Nishiguchi, M. Urbanek, L. Wadleigh, T. Wilkason, D. Aasen, K. Barnes, J. M. Bello-Rivas, I. Bloomfield, G. Booth, A. Brown, M. O. Brown, K. Cassella, G. Cowan, J. Epstein, M. Feldkamp, C. Griger, Y. Hassan, A. Heinz, E. Halperin, T. Hofler, F. Hummel, M. Jaffe, E. …

Repeated ancilla reuse for logical computation on a neutral atom quantum computer
Quantum processors based on neutral atoms trapped in arrays of optical tweezers have appealing properties, including relatively easy qubit number scaling and the ability to engineer arbitrary gate connectivity with atom movement. However, these platforms are inherently prone to atom loss, and the ability to replace lost atoms during a quantum computation is an important but previously elusive capability. Here, we demonstrate the ability to measure and re-initialize, and if necessary replace, a …

Graphene Electro-Absorption Modulators for Energy-Efficient and High-Speed Optical Transceivers
M. Tiberi, A. Montanaro, C. Wen, J. Zhang, O. Balci, S. M. Shinde, S. Sharma, A. Meersha, H. Shekhar, J. E. Muench, B. R. Conran, K. B. K. Teo, M. Ebert, X. Yan, Y. Tran, M. Banakar, C. Littlejohns, G. T. Reed, M. Romagnoli, A. Ruocco, V. Sorianello, A. C. Ferrari

Graphene Electro-Absorption Modulators for Energy-Efficient and High-Speed Optical Transceivers
The increasing demand for energy-efficient hardware for artificial intelligence (AI) and data centres requires integrated photonic solutions delivering optical transceivers with Tbit/s data rates and energy consumption$<$1pJ/bit. Here, we report double single-layer graphene electro-absorption modulators on Si optimized for energy-efficient and ultra-fast operation, demonstrating 67GHz bandwidth and 80Gbit/s data rate, in both O and C bands, using a fabrication tailored for wafer-scale integrati…

This https://arxiv.org/abs/2506.04665 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_csGT_…

An O(log log n)-approximate budget feasible mechanism for subadditive valuations
In budget-feasible mechanism design, there is a set of items $U$, each owned by a distinct seller. The seller of item $e$ incurs a private cost $\overline{c}_e$ for supplying her item. A buyer wishes to procure a set of items from the sellers of maximum value, where the value of a set $S\subseteq U$ of items is given by a valuation function $v:2^U\to \mathbb{R}_+$. The buyer has a budget of $B \in \mathbb{R}_+$ for the total payments made to the sellers. We wish to design a mechanism that is tr…

Multiversion of the Hausdorff--Young inequality
Paata Ivanisvili, Pavlos Kalantzopoulos
https://arxiv.org/abs/2506.08494 https://arxi…

Multiversion of the Hausdorff--Young inequality
We consider a family of jointly Gaussian random vectors $ξ_j \in \mathbb{R}^{k_j}$, each standard normal but possibly correlated, and investigate when\[ \mathbb{E}\, F\!\Bigl(B\bigl(|T_{z_1} f_1(ξ_1)|,\dots,|T_{z_n} f_n(ξ_n)|\bigr)\Bigr) \;\;\le\;\; F\!\Bigl(\,\mathbb{E}\,B\bigl(|f_1(ξ_1)|,\dots,|f_n(ξ_n)|\bigr)\Bigr) \] holds, where $T_{z}$ is either a Mehler transform $(z \in \mathbb{C})$ or a noise operator $(z \in \mathbb{R})$. This framework uni…

TOI-2407 b: a warm Neptune in the desert
C. Jan\'o Mu\~noz, M. J. Hooton, P. P. Pedersen, K. Barkaoui, B. V. Rackham, A. J. Burgasser, F. J. Pozuelos, K. G. Stassun, D. Queloz, A. H. M. J. Triaud, C. Ziegler, J. M. Almenara, M. Timmermans, X. Bonfils, K. A. Collins, B. O. Demory, G. Dransfield, M. Ghachoui, M. Gillon, E. Jehin, A. W. Mann, D. Sebastian, S. Thompson, J. D. Twicken, J. de Wit S. Z\'u\~niga-Fern\'andez

TOI-2407 b: a warm Neptune in the desert
We present the validation of TOI-2407 b, a warm Neptune-sized planet with a radius of 4.26 $\pm$ 0.26 R$_\oplus$, orbiting an early M-type star with a period of 2.7 days and an equilibrium temperature of 705 $\pm$ 12 K. The planet was identified by TESS photometry and validated in this work through multi-wavelength ground-based follow-up observations. We include an observation with the novel CMOS-based infrared instrument SPIRIT at the SPECULOOS Southern Observatory. The high-precision transit …

Conclusions from the excellent #AlternativeDefenceReview
https://cnduk.org/wp-content/uploads/2025/05/ADR-digital.pdf

This https://arxiv.org/abs/2501.01444 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

Local isometric immersions of pseudospherical surfaces described by a class of third order differential equations
We discuss a specific type of pseudospherical surfaces defined by a class of third order differential equations, of the form $u_t - u_{xxt} = λu^2 u_{xxx} + G(u, u_x, u_{xx})$, and poses a question about the dependence of the triples $\{a,b,c\}$ of the second fundamental form in the context of local isometric immersion in $\mathbb{E}^3$. It is demonstrated that the triples $\{a,b,c\}$ of the second fundamental form are not influenced by a jet of finite order of $u$. Instead, they are shown to …

FAUST XXVI. The dust opacity spectral indices of protostellar envelopes bridge the gap between interstellar medium and disks
Luca Cacciapuoti, L. Testi, A. J. Maury, C. Chandler, N. Sakai, C. Ceccarelli, C. Codella, M. De Simone, L. Podio, G. Sabatini, E. Bianchi, E. Macias, A. Miotello, C. Toci, L. Loinard, D. Johnstone, H. B. Liu, Y. Aikawa, Y. Shirley, B. Svoboda, T. Sakai, T. Hirota, S. Viti, B. Lefloch, Y. Oya, S. Ohashi, S. Feng, F. Fontani, Y. Watanabe, A. Lopez-Sepulcre, Y. Zha…

FAUST XXVI. The dust opacity spectral indices of protostellar envelopes bridge the gap between interstellar medium and disks
The sub-millimetre dust opacity spectral index is a critical observable to constrain dust properties, such as the maximum grain size of an observed dust population. It has been widely measured at galactic scales and down to protoplanetary disks. However, because of observational and analytical challenges, quite a gap exists in measuring dust properties in the envelopes that feed newborn protostars and their disks. To fill this gap, we use sensitive dust continuum emission data at 1.2 and 3.1 mm…

Searching for Historical Extragalactic Optical Transients Associated with Fast Radio Bursts
Y. Dong (Northwestern/CIERA), C. D. Kilpatrick, W. Fong, A. P. Curtin, S. Opoku, B. C. Andersen, A. M. Cook, T. Eftekhari, E. Fonseca, B. M. Gaensler, R. C. Joseph, J. F. Kaczmarek, L. A. Kahinga, V. Kaspi, A. E. Lanman, M. Lazda, C. Leung, K. W. Masui, D. Michilli, K. Nimmo, A. Pandhi, A. B. Pearlman, M. Sammons, P. Scholz, V. Shah, K. Shin, K. Smith

Searching for Historical Extragalactic Optical Transients Associated with Fast Radio Bursts
We present a systematic search for past supernovae (SNe) and other historical optical transients at the positions of fast radio burst (FRB) sources to test FRB progenitor systems. Our sample comprises 83 FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and its KKO Outrigger, along with 93 literature FRBs representing all known well-localized FRBs. We search for optical transients coincident in position and redshift with FRBs and find no significant associations within…

Spinless and spinful charge excitations in moir\'e Fractional Chern Insulators
Miguel Gon\c{c}alves, Juan Felipe Mendez-Valderrama, Jonah Herzog-Arbeitman, Jiabin Yu, Xiaodong Xu, Di Xiao, B. Andrei Bernevig, Nicolas Regnault
https://arxiv.org/abs/2506.05330

Spinless and spinful charge excitations in moiré Fractional Chern Insulators
Fractionally charged elementary excitations, the quasi-electron and quasi-hole, are one of the hallmarks of the fractional Chern insulator (FCI). In this work, we observe that spontaneous spin polarization in twisted MoTe$_2$ leads to multiple species of low-energy quasi-particles distinguished by their spin quantum numbers. We perform large-scale exact diagonalization (ED) calculations to investigate the nature of these excitations and develop a method to extract their fundamental energetic pr…

Three Hot Jupiters transiting K-dwarfs with a significant heavy element mass
Y. G. C. Frensch, F. Bouchy, G. Lo Curto, S. Ulmer-Moll, S. G. Sousa, N. C. Santos, K. G. Stassun, C. N. Watkins, H. Chakraborty, K. Barkaoui, M. Battley, W. Ceva, K. A. Collins, T. Daylan, P. Evans, J. P. Faria, C. Farret Jentink, E. Fontanet, E. Frid\'en, G. Furesz, M. Gillon, N. Grieves, C. Hellier, E. Jehin, J. M. Jenkins, L. K. W. Kwok, D. W. Latham, B. Lavie, N. Law, A. W. Mann, F. Murgas, E. Palle, …

Three Hot Jupiters transiting K-dwarfs with a significant heavy element mass
Albeit at a lower frequency than around hotter stars, short-period gas giants around low-mass stars ($T_\mathrm{eff} < 4965$ K) do exist, despite predictions from planetary population synthesis models that such systems should be exceedingly rare. By combining data from TESS and ground-based follow-up observations, we seek to confirm and characterize giant planets transiting K dwarfs, particularly mid/late K dwarfs. Photometric data were obtained from the TESS mission, supplemented by ground-bas…

Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
Haochen Wang, Kiyoshi Masui, Shion Andrew, Emmanuel Fonseca, B. M. Gaensler, R. C. Joseph, Victoria M. Kaspi, Bikash Kharel, Adam E. Lanman, Calvin Leung, Lluis Mas-Ribas, Juan Mena-Parra, Kenzie Nimmo, Aaron B. Pearlman, Ue-Li Pen, J. Xavier Prochaska, Ryan Raikman, Kaitlyn Shin, Seth R. Siegel, Kendrick M. Smith, Ingrid H. Stairs

Measurement of the Dispersion$\unicode{x2013}$Galaxy Cross-Power Spectrum with the Second CHIME/FRB Catalog
The dispersion of extragalactic fast radio bursts (FRBs) can serve as a powerful probe of the diffuse plasma between and surrounding galaxies, which contains most of the Universe's baryons. By cross-correlating the dispersion of background FRBs with the locations of foreground galaxies, we can study the relative spatial distributions of plasma and galaxies on scales of 0.1 to 50 Mpc, which are strongly affected by feedback processes in galaxy formation. Here we present the measurement of the di…

Optimization and validation of charge transport simulation for hybrid pixel detectors incorporating the repulsion effect
X. Xie, A. Bergamaschi, M. Br\"uckner, M. Carulla, R. Dinapoli, S. Ebner, K. Ferjaoui, A. Francesca Mazzoleni, J. Franklin Mulvey, V. Gautam, D. Greiffenberg, S. Hasanaj, J. Heymes, V. Hinger, V. Kedych, T. King, S. Li, C. Lopez-Cuenca, D. Mezza, K. Moustakas, A. Mozzanica, M. M\"uller, K. A. Paton, C. Ruder, B. Schmitt, P. Sieberer, S. Silletta, D. Thattil…

Optimization and validation of charge transport simulation for hybrid pixel detectors incorporating the repulsion effect
For emerging applications of hybrid pixel detectors which require high spatial resolution, e.g., subpixel interpolation in X-ray imaging and deep learning-based electron localization, accurate modeling of charge transport processes in the sensor is highly demanded. To address this, two open-source, time-stepping Monte Carlo simulation methods have been developed, both explicitly incorporating charge repulsion, which are found necessary for accurate simulation when charge sharing becomes importa…

Updated baseline design for HALHF: the hybrid, asymmetric, linear Higgs factory
C. A. Lindstr{\o}m, E. Adli, J. B. B. Chen, P. Drobniak, E. E. H{\o}rlyk, D. Kalvik, K. N. Sjobak, T. Barklow, S. Gessner, M. Hogan, M. Berggren, A. Laudrain, B. List, J. List, V. Maslov, K. P\~oder, M. Th\'evenet, N. Walker, J. Wood, S. Boogert, P. N. Burrows, V. Cilento, R. D'Arcy, B. Foster, S. Farrington, X. Lu, G. Moortgat-Pick, A. Seryi

Updated baseline design for HALHF: the hybrid, asymmetric, linear Higgs factory
Particle physicists aim to construct a electron-positron Higgs factory as the next major particle collider. However, the high associated costs motivate the development of more affordable collider designs. Plasma-wakefield acceleration is a promising technology to this end. HALHF is a proposal for a Higgs factory that utilizes beam-driven plasma-wakefield acceleration to accelerate electrons to high energy with high gradient, while using radio-frequency acceleration to accelerate positrons to a …

Search for millicharged particles in proton-proton collisions at $\sqrt{s} = 13.6$ TeV
S. Alcott, Z. Bhatti, J. Brooke, C. Campagnari, M. Carrigan, M. Citron, R. De Los Santos, A. De Roeck, C. Dorofeev, T. Du, J. Goldstein, F. Golf, N. Gonzalez, A. Haas, J. Heymann, C. S. Hill, D. Imani, M. Joyce, K. Larina, R. Loos, S. Lowette, H. Mei, D. W. Miller, B. Peng, S. N. Santpu, I. Reed, E. Schaffer, R. Schmitz, J. Steenis, D. Stuart, J. S. Tafoya Vargas, D. Vannerom, T. Wybouw, Z. Xiao, H. …

Search for millicharged particles in proton-proton collisions at $\sqrt{s} = 13.6$ TeV
We report on a search for elementary particles with charges much smaller than the electron charge using a data sample of proton-proton collisions provided by the CERN Large Hadron Collider in 2023--24, corresponding to an integrated luminosity of 124.7~fb$^{-1}$ at a center-of-mass energy of 13.6~TeV. The analysis presented uses the completed Run 3 milliQan bar detector to set the most stringent constraints to date for particles with charges $\leq0.24~\rm{e}$ and masses $\geq0.45~\rm{GeV}$.

Low noise flux estimate and data quality control monitoring in EUCLID-NISP cosmological survey
B. Kubik, R. Barbier, P. Calabria, A. Castera, E. Chabanat, F. Charlieu, J-C. Clemens, A. Ealet, S. Ferriol, W. Gillard, T. Maciaszek, E. Prieto, F. Schirra, A. Secroun, B. Serra, G. Smadja, A. Tilquin, J. Zoubianb
https://arxiv.org/ab…

Low noise flux estimate and data quality control monitoring in EUCLID-NISP cosmological survey
Euclid mission is designed to understand the dark sector of the universe. Precise redshift measurements are provided by H2RG detectors. We propose an unbiased method of fitting the flux with Poisson distributed and correlated data, which has an analytic solution and provides a reliable quality factor - fundamental features to ensure the goals of the mission. We compare our method to other techniques of signal estimation and illustrate the anomaly detection on the flight like detectors. Although…

Extremely large oblate deformation of the first excited state in $^{12}$C: a new challenge to modern nuclear theory
C. Ngwetsheni, J. N. Orce, P. Navr\'atil, P. E. Garrett, T. Faestermann, A. Bergmaier, M. Frosini, V. Bildstein, B. A. Brown, C. Burbadge, T. Duguet, K. Hady\'nska-Kl\c{e}k, M. Mahgoub, C. V. Mehl, A. Pastore, A. Radich, S. Triambak

Extremely large oblate deformation of the first excited state in $^{12}$C: a new challenge to modern nuclear theory
A Coulomb-excitation study of the high-lying first excited state at 4.439 MeV in the nucleus $^{12}$C has been carried out using the $^{208}$Pb($^{12}$C,$^{12}$C$^*$)$^{208}$Pb$^*$ reaction at 56 MeV and the {\sc Q3D} magnetic spectrograph at the Maier-Leibnitz Laboratorium in Munich. High-statistics achieved with an average beam intensity of approximately 10$^{11}$ ions/s together with state-of-the-art {\it ab initio} calculations of the nuclear dipole polarizability permitted the accurate det…

An O(log log n)-approximate budget feasible mechanism for subadditive valuations
Rian Neogi, Kanstantsin Pashkovich, Chaitanya Swamy
https://arxiv.org/abs/2506.04665

An O(log log n)-approximate budget feasible mechanism for subadditive valuations
In budget-feasible mechanism design, there is a set of items $U$, each owned by a distinct seller. The seller of item $e$ incurs a private cost $\overline{c}_e$ for supplying her item. A buyer wishes to procure a set of items from the sellers of maximum value, where the value of a set $S\subseteq U$ of items is given by a valuation function $v:2^U\to \mathbb{R}_+$. The buyer has a budget of $B \in \mathbb{R}_+$ for the total payments made to the sellers. We wish to design a mechanism that is tr…

Lipschitz free $p$-spaces for $0<p<1$ in the light of the Schur $p$-property and the compact reduction
Fernando Albiac, Jos\'e L. Ansorena, Jan B\'ima, Marek C\'uth
https://arxiv.org/abs/2506.09786

Lipschitz free $p$-spaces for $0
The geometric analysis of non-locally convex quasi-Banach spaces presents rich and nuanced challenges. In this paper, we introduce the Schur $p$-property and the strong Schur $p$-property for $0 < p \leq 1$, providing new tools to deepen the understanding of these spaces, and the Lipschitz free $p$-spaces in particular. Moreover, by developing an adapted version of the compact reduction principle, we prove that Lipschitz free $p$-spaces over discrete metric spaces possess the approximation prop…