Tootfinder

Algebraic traversable wormholes
Eyoab Bahiru
https://arxiv.org/abs/2508.13283 https://arxiv.org/pdf/2508.13283

Algebraic traversable wormholes
We propose a new large $N$ limit which at the extreme limit is dual in the bulk to a back-reacted traversable wormhole, by making use if a novel definition of algebra at infinity, an algebra familiar in the literature from the study of quasi-local algebras. We also compute, from a purely algebraic perspective, the effects registered by a left universe observer due to a unitary fluctuation on the right universe of the traversable wormhole, and reproduce a result from an earlier computation by Ma…

Measurements and TCAD simulations of innovative RSD and DC-RSD LGAD devices for future 4D tracking
F. Moscatelli, A. Fondacci, R. Arcidiacono, M. Boscardin, N. Cartiglia, M. Centis Vignali, T. Croci, M. Ferrero, O. Hammad Ali, L. Lanteri, A. Losana, L. Menzio, V. Monaco, R. Mulargia, D. Passeri G. Paternoster, F. Siviero, V. Sola, A. Morozzi
https://

Measurements and TCAD simulations of innovative RSD and DC-RSD LGAD devices for future 4D tracking
This paper summarizes the beam test results obtained with a Resistive Silicon Detector (RSD) (also called AC-Low Gain Avalanche Diode, AC-LGAD) pixel array tested at the DESY beam test facility with a 5 GeV/c electron beam. Furthermore, it describes in detail the simulation results of DC-RSD, an evolution of the RSD design. The simulations campaign described in this paper has been instrumental in the definition of the structures implemented in the Fondazione Bruno Kessler FBK first DC-RSD produ…

Rigid body rotation and chiral reorientation combine in filamentous E. coli swimming in low-Re flows
Richard Z. DeCurtis, Yongtae Ahn, Jane Hill, Sara M. Hashmi
https://arxiv.org/abs/2508.00779

Rigid body rotation and chiral reorientation combine in filamentous E. coli swimming in low-Re flows
Antibiotic doses below a minimum inhibitory concentration turn off bacteria cell division, but not cell growth. As a result, rod-like bacteria including E. coli can elongate many times their original length without increasing their width. The swimming behavior of these filamentous bacteria through small channels may provide insights into how antibiotic-resistant bacteria swim to channel walls. Such swimming behaviors in settings like hospital tubing may facilitate adhesion, biofilm formation an…

Innovative DC-coupled Resistive Silicon Detector for 4D tracking
R. Arcidiacono, G. Bardelli, M. Bartolini, M. Boscardin, N. Cartiglia, A. Cassese, M. Centis Vignali, T. Croci, M. Ferrero, A. Fondacci, O. Hammad Ali, M. Lizzo, L. Menzio, A. Morozzi, F. Moscatelli, D. Passeri, G. Paternoster, G. Sguazzoni, F. Siviero, V. Sola, L. Viliani
https://

Innovative DC-coupled Resistive Silicon Detector for 4D tracking
In the past 10 years, two design innovations, the introduction of low internal gain (LGAD) and of resistive read-out (RSD), have radically changed the performance of silicon detectors. The LGAD mechanism, increasing the signal-to-noise ratio by about a factor of 20, leads to improved time resolution (typically 30 ps for a 50-$μ$m thick sensor), while resistive read-out, sharing the collected charge among read-out electrodes, leads to excellent spatial resolution even using large pixels (about …

A Two-Operator Calculus for Arithmetic-Progression Paths in the Collatz Graph
Sebastian Angermund
https://arxiv.org/abs/2506.19115 https://

A Two-Operator Calculus for Arithmetic-Progression Paths in the Collatz Graph
A recast of the standard residue-class analysis of the 3x+1 (Collatz) map in terms of two elementary operators on arithmetic progressions. The resulting calculus (i) splits any progression into its even and odd subsequences in a single step, (ii) gives a closed formula for every set of seeds that realises a prescribed parity word, (iii) yields a one line affine invariant that forbids trajectories consisting of infinitely many odd moves, and (iv) reduces the non-trivial-cycle problem to a pair o…