Tootfinder

Anthropic says it worked with the US National Nuclear Security Administration on a classifier to block concerning chats, like those on building nuclear reactors (Morgan Chalfant/Semafor)
https://www.semafor.com/article/08/21/2025/anthropic-develops-anti-nuke-a…

Anthropic develops anti-nuke AI tool
The company built a tool designed to prevent its AI models from being used to make nuclear weapons.

You've got a Freund--Rubin in Me: The Aretakis Instability of Extremal Black Branes
Calvin Y. -R. Chen, \'Aron D. Kov\'acs
https://arxiv.org/abs/2507.12529

You've got a Freund--Rubin in Me: The Aretakis Instability of Extremal Black Branes
We investigate how the Aretakis instability affects non-dilatonic extremal black $p$-branes by focusing on their near-horizon geometry. Crucially, the strength of the instability, \textit{i.e.} the number of transverse derivatives needed to see non-decay/blow-up of fields on the horizon at late null time, is given by the scaling dimensions with respect to the near-horizon $\mathrm{AdS}_{p+2}$-factor. This renders the problem of determining the severity of the Aretakis instability equivalent to …

The New York Cookie always crumbles!
#NY #cookies #logo #artwork

Rational G-spectra over blocks with finite Weyl groups
J. P. C. Greenlees
https://arxiv.org/abs/2508.07752 https://arxiv.org/pdf/2508.07752

Rational G-spectra over blocks with finite Weyl groups
We show that for any clopen collection X of subgroups of G with finite Weyl groups, the category of G-spectra with geometric isotropy in X is equivalent to the category of equivariant sheaves over X. This gives an algebraic model of injective dimension at most the rank of G.

High-fidelity collisional quantum gates with fermionic atoms
Petar Bojovi\'c, Timon Hilker, Si Wang, Johannes Obermeyer, Marnix Barendregt, Dorothee Tell, Thomas Chalopin, Philipp M. Preiss, Immanuel Bloch, Titus Franz
https://arxiv.org/abs/2506.14711

High-fidelity collisional quantum gates with fermionic atoms
Quantum simulations of electronic structure and strongly correlated quantum phases are widely regarded as among the most promising applications of quantum computing. These simulations require the accurate implementation of motion and entanglement of fermionic particles. Instead of the commonly applied costly mapping to qubits, fermionic quantum computers offer the prospect of directly implementing electronic structure problems. Ultracold neutral atoms have emerged as a powerful platform for spi…

The watery atmosphere of HD~209458~b revealed by joint $K$- and $L$-band high-resolution spectroscopy
Luke Finnerty, Julie Inglis, Michael P. Fitzgerald, Daniel Echeverri, Nemanja Jovanovic, Dimitri Mawet, Geoffrey A. Blake, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Katelyn Horstman, Chih-Chun Hsu, Joshua Liberman, Ronald A. L\'opez, Evan Morris, Jacklyn Pezzato-Rovner, Jean-Baptiste Ruffio, Ben Sappey, Tobias Schofield, An…

The watery atmosphere of HD~209458~b revealed by joint $K$- and $L$-band high-resolution spectroscopy
We present a joint analysis of high-resolution $K$- and $L$-band observations of the benchmark hot Jupiter \hdb\ from the Keck Planet Imager and Characterizer (KPIC). One half night of observations were obtained in each bandpass covering similar pre-eclipse phases. The two epochs were then jointly analyzed using our atmospheric retrieval pipeline based on \petit\ to constrain the atmospheric pressure-temperature profile and chemical composition. Consistent with recent results from \textit{JWST}…

Measurement of the $^\text{nat}$C(n,p) and $^\text{nat}$C(n,d) reactions from n_TOF at CERN
P. \v{Z}ugec, N. Colonna, D. Rochman, M. Barbagallo, J. Andrzejewski, J. Perkowski, A. Ventura, D. Bosnar, A. Gawlik-Ramiega, M. Sabat\'e-Gilarte, M. Bacak, F. Mingrone, E. Chiaveri, O. Aberle, V. Alcayne, S. Amaducci, L. Audouin, V. Babiano-Suarez, S. Bennett, E. Berthoumieux, J. Billowes, A. Brown, M. Busso, M. Caama\~no, L. Caballero-Ontanaya, F. Calvi\~no, M. Calviani, D. Cano-Ott, A. Ca…

Measurement of the $^\text{nat}$C(n,p) and $^\text{nat}$C(n,d) reactions from n_TOF at CERN
The energy dependence of the cross section of the (n,p) and (n,d) reactions on $^\text{nat}$C has been studied for the first time at the n_TOF facility at CERN, from the particle detection threshold up to 25 MeV. The measurement was performed with two telescopes made of position-sensitive silicon $ΔE$-$E$ detectors, covering the angular range from 20° to 140°. A detector efficiency has been determined by means of Monte Carlo simulations of the experimental setup. Various assumptions on the a…

Last week, I finished a book that I really liked but the one I followed up with was a letdown so I reckoned I would finally read Elana Ferrante’s “My Brilliant Friend,” which everyone says is so great and it’s on my shelf anyway, bu then I found this old edition of GB Shaw plays and I’m reading that instead, Pygmalion first. It’s very funny — I laughed out loud in Act V. Also — spoiler alert! — it has a better ending than the 1964 film (which I love anyway!).

I'm baffled that this guy is a respected analyst. Yeah, an infinite number of AI agents will spend their money on content from human creators, making those humans infinitely rich. I see no flaws in this model.

New preprint just landed in @… for #TheCryosphere - it's about our fieldwork in NW #Greenland near Qaanaaq - so if you're interested in #glaciers, calving, #icebergs and melange go check it out...
#NCKF
(May blog it later if I get time, still trying to finalise another paper for resubmission #ScienceNeverSleeps
https://egusphere.copernicus.org/preprints/2025/egusphere-2025-1907/