Tootfinder

Mittwoch: YouTube-KI verschlimmbessert Videos, Google Translate als Sprachlehrer
KI-Optimierer übertreibt Google-Übersetzer erweitert Apples iPhone-Event in 2 Wochen EUid ohne Überwachung Zweifel an Intel-Sicherheit Bit-Rauschen

Existence and nonexistence of spherical $5$-designs of minimal type
Sho Suda, Zili Xu, Wei-Hsuan Yu
https://arxiv.org/abs/2508.18685 https://arxiv.org/pdf/…

Existence and nonexistence of spherical $5$-designs of minimal type
This paper investigates the existence and properties of spherical $5$-designs of minimal type. We focus on two cases: tight spherical $5$-designs and antipodal spherical $4$-distance $5$-designs. We prove that a tight spherical $5$-design is of minimal type if and only if it possesses a specific $Q$-polynomial coherent configuration structure. For tight spherical $5$-designs in $\mathbb{R}^d$ of minimal type, we demonstrate that half of the derived code forms an equiangular tight frames (ETF) w…

PitchBook: US VC investment in AI startups rose 33% QoQ to $65B in Q1, up 550% from the quarter prior to ChatGPT's 2022 release (Cade Metz/New York Times)
https://www.nytimes.com/2025/06/27/technology/ai-spending-openai-amazon-meta.html…

A.I. Frenzy Escalates as OpenAI, Amazon and Meta Supersize Spending
Companies like OpenAI, Amazon and Meta have supersized their spending on artificial intelligence, with no signs of slowing down.

Kann mir mal jemand erklären, warum die Augustusbrücke für die #Finals 7 Tage lang komplett für den Radverkehr gesperrt, während die Linien der DVB auf der Brücke nur an 3 Tagen stundenweise unterbrochen werden müssen?
Und warum steht der Scheiß jetzt schon rum, wenn die Sperrung erst ab Mittwoch gilt?

Witkoff: Treffen mit Vertretern der Ukraine in New York geplant
Der US-Gesandte Steve Witkoff will sich nach eigenen Angaben noch in dieser Woche mit Vertretern der Ukraine treffen. "Ich werde mich also diese Woche in New York mit ihnen treffen, und es ist ein wichtiges Signal, dass wir täglich mit den Russen sprechen", sagte Witkoff dem US-Sender Fox News
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Ukraine-Liveblog: ++ Ukraine meldet Angriffe auf Energieinfrastruktur ++
Russland hat laut der ukrainischen Regierung in der Nacht die Energieinfrastruktur in mehreren Regionen angegriffen. Der US-Gesandte Witkoff will sich nach eigenen Angaben noch diese Woche mit Vertretern der Ukraine treffen.

The Josephson effect in Fibonacci superconductors
Ignacio Sardinero, Jorge Cayao, Keiji Yada, Yukio Tanaka, Pablo Burset
https://arxiv.org/abs/2507.19147 https://

The Josephson effect in Fibonacci superconductors
We theoretically investigate the Josephson effect between two proximized Fibonacci quasicrystals. A quasiperiodic modulation of the chemical potential on a superconducting substrate induces topological gaps and edge modes with energies above the superconducting gap. We reveal that these edge modes develop superconducting correlations which significantly impact the Josephson current, and we term them Fibonacci-Andreev bound states. Notably, the contribution from these edge modes can be controlle…

Gravitational perturbations of the Hayward spacetime and testing the correspondence between quasinormal modes and grey-body factors
Zainab Malik
https://arxiv.org/abs/2508.19178

Gravitational perturbations of the Hayward spacetime and testing the correspondence between quasinormal modes and grey-body factors
The paper studies axial gravitational perturbations of the Hayward black hole, a regular geometry that also arises as an effective solution in asymptotically safe gravity. By computing grey-body factors with the 6th-order WKB method and comparing them to predictions based on the quasinormal modes, the correspondence between transmission coefficients and quasinormal spectra is verified. Quantum corrections, parametrized by $γ$, are shown to suppress both the grey-body factors and the absorption…

A second-order cone representable class of nonconvex quadratic programs
Santanu S. Dey, Aida Khajavirad
https://arxiv.org/abs/2508.18435 https://arxiv.org/…

A second-order cone representable class of nonconvex quadratic programs
We consider the problem of minimizing a sparse nonconvex quadratic function over the unit hypercube. By developing an extension of the Reformulation Linearization Technique (RLT) to continuous quadratic sets, we propose a novel second-order cone (SOC) representable relaxation for this problem. By exploiting the sparsity of the quadratic function, we establish a sufficient condition under which the convex hull of the feasible region of the linearized problem is SOC-representable. While the propo…

Microscopic Fingerprint of Chiral Superconductivity
Xuefeng Wu, Xuan Hao, Zhuo Chen, Yuchang Cai, Minghao Wu, Congrun Chen, Kedong Wang, Fangfei Ming, Steven Johnston, Rui-Xing Zhang, Hanno H. Weitering
https://arxiv.org/abs/2507.18693

Microscopic Fingerprint of Chiral Superconductivity
Chiral superconductors have long been theorized to break time-reversal symmetry and support exotic topological features such as Majorana modes and spontaneous edge currents, promising ingredients for quantum technologies. Although several unconventional superconductors may exhibit time-reversal symmetry breaking, clear microscopic evidence of chiral pairing has remained out of reach. In this work, we demonstrate direct real-space signatures of chiral superconductivity in a single atomic layer o…

Non-Hermitian Josephson junctions with four Majorana zero modes
Jorge Cayao, Masatoshi Sato
https://arxiv.org/abs/2508.19433 https://arxiv.org/pdf/2508.194…

Non-Hermitian Josephson junctions with four Majorana zero modes
Josephson junctions formed by finite-length topological superconductors host four Majorana zero modes when the phase difference between the superconductors is $φ=π$ and their length is larger than the Majorana localization length. While this picture is understood in terms of a Hermitian description of isolated junctions, unavoidable transport conditions due to coupling to reservoirs make them open and ground for non-Hermitian effects that still remain largely unexplored. In this work, we inve…