Tootfinder

Generation of frequency-bin-encoded dual-rail cluster states via time-frequency multiplexing of microwave photonic qubits
Zhiling Wang, Takeaki Miyamura, Yoshiki Sunada, Keika Sunada, Jesper Ilves, Kohei Matsuura, Yasunobu Nakamura
https://arxiv.org/abs/2508.10990

Generation of frequency-bin-encoded dual-rail cluster states via time-frequency multiplexing of microwave photonic qubits
Cluster states are a class of multi-qubit entangled states with broad applications such as quantum metrology and one-way quantum computing. Here, we present a protocol to generate frequency-bin-encoded dual-rail cluster states using a superconducting circuit consisting of a fixed-frequency transmon qubit, a resonator and a Purcell filter. We implement time-frequency multiplexing by sequentially emitting co-propagating microwave photons of distinct frequencies. The frequency-bin dual-rail encodi…

fun new project unpacking ephemera by jay hinman, proprietor of dynamite hemorrhage/ @…/radio dies screaming. https://collectedephemera.substack.com

Collected Ephemera | Jay Hinman | Substack
A deep dive into the paper, magazines and marginal collectables I've accumulated over the years, especially 60s & 70s political rabble-rousing, underground music, smut, hippy/biker stuff, postcards and much else. Click to read Collected Ephemera, by Jay Hinman, a Substack publication. Launched 2 hours ago.

Improving Anomalous Sound Detection with Attribute-aware Representation from Domain-adaptive Pre-training
Xin Fang, Guirui Zhong, Qing Wang, Fan Chu, Lei Wang, Mengui Qian, Mingqi Cai, Jiangzhao Wu, Jianqing Gao, Jun Du
https://arxiv.org/abs/2509.12845

Improving Anomalous Sound Detection with Attribute-aware Representation from Domain-adaptive Pre-training
Anomalous Sound Detection (ASD) is often formulated as a machine attribute classification task, a strategy necessitated by the common scenario where only normal data is available for training. However, the exhaustive collection of machine attribute labels is laborious and impractical. To address the challenge of missing attribute labels, this paper proposes an agglomerative hierarchical clustering method for the assignment of pseudo-attribute labels using representations derived from a domain-a…

On manifolds homeomorphic to spheres
Somnath Basu, Sachchidanand Prasad
https://arxiv.org/abs/2509.13008 https://arxiv.org/pdf/2509.13008

On manifolds homeomorphic to spheres
We prove a result analogous to Reeb's theorem in the context of Morse-Bott functions: if a closed, smooth manifold $M$ admits a Morse-Bott function having two critical submanifolds $S^k$ and $S^l$ ($k \neq l$), then $M$ has dimension $k+l+1$ and is homeomorphic to the standard sphere $S^{k+l+1}$ but not necessarily diffeomorphic to it. We also prove similar results for projective spaces over the real numbers, complex numbers and quaternions.

The Environmental Protection Agency moved on Friday
to stop requiring thousands of polluting facilities to report the amount of heat-trapping greenhouse gases that they release into the air.
https://www.nytimes.com/2025/09/12/…

E.P.A. To Stop Collecting Emissions Data From Polluters
The data, from thousands of coal-burning power plants, oil refineries, steel mills and other industrial facilities, is the country’s most comprehensive way to track greenhouse gases.

Chemical Abundances of M and G Dwarfs in the Hyades and Coma Berenices Open Clusters from APOGEE Spectra
Deusalete Vilar, Diogo Souto, Katia Cunha, Anderson andrade-silva, Veronica Loaiza-Tucuri, Fabio Wanderley, Verne V. Smith, Vinicius Grilo, Cintia F. Martinez, Barbara Rojas-Ayala, Zachary Way
https://arxiv.org/abs/2509.11938

Chemical Abundances of M and G Dwarfs in the Hyades and Coma Berenices Open Clusters from APOGEE Spectra
Open clusters are one of the best astrophysical laboratories we have available for stellar astrophysics studies. This work presents metallicities and individual abundances for fourteen M dwarfs and six G dwarfs from two well-known open clusters: Hyades and Coma Berenices. Our analysis is based on near-infrared (1.51--1.69 $μ$m), high-resolution ($R \sim 22,500$) spectra obtained from the SDSS IV/APOGEE Survey. Using one-dimensional, plane-parallel MARCS model atmospheres, the APOGEE line list,…

A proof that all the sliding trajectories of generic inelastic piecewise linear dynamical systems over the torus are closed
Mayara D. A. Caldas, Ricardo M. Martins
https://arxiv.org/abs/2508.11066

A proof that all the sliding trajectories of generic inelastic piecewise linear dynamical systems over the torus are closed
In this article, we consider piecewise smooth differential equations $Z_{X_-X_+}$, where $X_-$ and $X_+$ are linear vector fields in dimension 3, having the torus as discontinuity manifold. We consider that $Z_{X_-X_+}$ is an inelastic vector field over the torus. We classify the set of tangency points on the torus for certain conditions and describe the behavior of the trajectories of the sliding vector field over the torus. We prove that, under generic conditions, all the trajectories of a pi…

Spherically symmetric counterflow turbulence in open geometry
Tom\'a\v{s} Dunca, Filip Novotn\'y, Marek Tal\'i\v{r}, Bal\'azs Szalai, Nikita Ustinov, Ladislav Skrbek, Emil Varga
https://arxiv.org/abs/2509.14103

Spherically symmetric counterflow turbulence in open geometry
We report preliminary results on spherical thermal counterflow generated by a small central heater in an open geometry, an open bath of superfluid He~II, as closed-cell experiments could have introduced artifacts such as overheating and boundary-induced flows. In order to eliminate them, we measure second sound attenuation in a plane-parallel resonator. Our results are at variance with the previous experiments in closed spherical cavity that showed plateau in the steady-state vortex line densit…

Complex non-backtracking matrix for directed graphs
Keishi Sando, Hideitsu Hino
https://arxiv.org/abs/2507.12503 https://arxiv.org/pd…

Complex non-backtracking matrix for directed graphs
Graph representation matrices are essential tools in graph data analysis. Recently, Hermitian adjacency matrices have been proposed to investigate directed graph structures. Previous studies have demonstrated that these matrices can extract valuable information for clustering. In this paper, we propose the complex non-backtracking matrix that integrates the properties of the Hermitian adjacency matrix and the non-backtracking matrix. The proposed matrix has similar properties with the non-backt…

Best Practices and Considerations for Child Speech Corpus Collection and Curation in Educational, Clinical, and Forensic Scenarios
John Hansen, Satwik Dutta, Ellen Grand
https://arxiv.org/abs/2507.12870

Best Practices and Considerations for Child Speech Corpus Collection and Curation in Educational, Clinical, and Forensic Scenarios
A child's spoken ability continues to change until their adult age. Until 7-8yrs, their speech sound development and language structure evolve rapidly. This dynamic shift in their spoken communication skills and data privacy make it challenging to curate technology-ready speech corpora for children. This study aims to bridge this gap and provide researchers and practitioners with the best practices and considerations for developing such a corpus based on an intended goal. Although primarily foc…