Tootfinder

GW231109_235456: A Sub-threshold Binary Neutron Star Merger in the LIGO-Virgo-KAGRA O4a Observing Run?
Wanting Niu, Chad Hanna, Carl-Johan Haster, Shomik Adhicary, Pratyusava Baral, Amanda Baylor, Bryce Cousins, Jolien D. E. Creighton, Heather Fong, Yun-Jing Huang, Rachael Huxford, Prathamesh Joshi, James Kennington, Alvin K. Y. Li, Ryan Magee, Duncan Meacher, Cody Messick, Soichiro Morisaki, Cort Posnansky, Surabhi Sachdev, Shio Sakon, Urja Shah, Divya Singh, Ron Tapia, Leo Tsukada, A…

GW231109_235456: A Sub-threshold Binary Neutron Star Merger in the LIGO-Virgo-KAGRA O4a Observing Run?
We present a sub-threshold search for gravitational-wave inspirals from binary neutron stars using data from the first part of the fourth observing run of the LIGO-Virgo-KAGRA Collaboration. To enhance sensitivity to this targeted population, we incorporate a redshift-corrected population model based on radio observations of Galactic double neutron star systems. The search identifies a significant trigger with a false-alarm rate of about one per 50 years and a network signal-to-noise ratio of 9…

Injector for dielectric laser accelerators based on an ultracold electron source and a magnet design avoiding apparent emittance growth
Ameya Patwardhan, Simona Borrelli, Bas van der Geer, Jom Luiten, Julius Huijts
https://arxiv.org/abs/2510.09831

Injector for dielectric laser accelerators based on an ultracold electron source and a magnet design avoiding apparent emittance growth
Dielectric Laser Acceleration holds the promise of extremely high acceleration gradients in laser-driven miniaturized accelerator structures. However, sub-relativistic experimental demonstration has so far been limited by bunch charges well below 1 electron per bunch due to the low acceptance of these 'accelerator-on-a-chip' devices. Here, we propose a novel design for an injector tailor made for dielectric laser acceleration, based on just-above-threshold ionization of laser-cooled atoms. The …

Random singlet physics in the $S = \frac{1}{2}$ pyrochlore antiferromagnet NaCdCu$_2$F$_7$
Andrej Kancko, Hironori Sakai, Cinthia Antunes Corr\^ea, Petr Proschek, Jan Prokle\v{s}ka, Tetiana Haidamak, Marc Uhlarz, Adam Berlie, Yo Tokunaga, Ross Harvey Colman
https://arxiv.org/abs/2509.20199

Random singlet physics in the $S = \frac{1}{2}$ pyrochlore antiferromagnet NaCdCu$_2$F$_7$
We report a random singlet ground state in the $S = \frac{1}{2}$ Heisenberg pyrochlore antiferromagnet NaCdCu$_2$F$_7$. Cationic Na$^+$/Cd$^{2+}$ disorder generates a broad distribution of Cu$^{2+}$-F$^{-}$-Cu$^{2+}$ exchange couplings. Despite strong antiferromagnetic interactions, no magnetic order or freezing occurs, with $μ$SR measurements confirming dynamics down to 58 mK. $T$-linear specific heat, a Curie-like susceptibility tail, and universal power-law scaling with data collapse in $χ…