Kavli Affiliate: Kiyoshi Masui | Summary:Fast radio bursts (FRBs) are an emerging precision probe of cosmological fluctuations. The amount and quality of observed FRB data will grow enormously over the next decade. FRB dispersion data directly probe the free electron distribution up to intergalactic scales. Precision models of the free electron distribution are necessary to […]
Kavli Affiliate: Michael Turner | Summary:We respond to the recent paper by Efstathiou (arXiv:2607.29562) who makes several statements that appear to be in conflict with our recent paper (Turner & Huterer, arXiv:2606.05358). We stand by our primary result that direct determinations of $H_0$ can be sensitive to the late-time expansion history. We also point out […]
Kavli Affiliate: Xian Chen| Summary: We study (non-induced) subgraph counting under interactive local edge differential privacy (LEDP). Given a fixed pattern graph $H$ with $k$ vertices, $ellge1$ edges, and $q$ connected components, our goal is to approximately count its copies in an arbitrary $n$-vertex undirected graph while preserving edge privacy. We give two complementary accuracy […]
Kavli Affiliate: Mazhar Ali | Summary: We study the entanglement dynamics of two qutrits under collective dephasing for a family of states obtained by mixing a maximally entangled state that lives in the decoherence-free subspace with three nonstationary two-term states sharing a common amplitude ratio $r$. We obtain exact PPT and separability regions along the […]
Kavli Affiliate: Risa Wechsler | Summary:Small-scale galaxy clustering contains substantial cosmological information, but extracting it reliably requires robust modeling of the galaxy–halo connection. In this work, we compare two widely adopted families of empirical models, subhalo abundance matching (SHAM) and the halo occupation distribution (HOD), testing their predictions for galaxy clustering and their recovery of […]
Kavli Affiliate: Feng Long| Summary: This paper develops upper L-statistic methods for testing and localizing a high-dimensional mean change. At each candidate split, the proposed statistics rank the squared studentized CUSUM values across coordinates and aggregate either a fixed number or a fixed proportion of the largest entries. This construction connects max-type and sum-type procedures […]
Kavli Affiliate: Luis Ho | Summary:We report the discovery of the Seyfert galaxy J234728.73+242745.7 as a recurrent intermediate-type CLAGN with extreme optical/UV variability. Optical spectra spanning nearly three decades reveal Type 1.0$rightarrow$1.5$rightarrow$1.2 transitions, accompanied by the disappearance and reappearance of broad He II $lambda4686$ and a broad-line Balmer decrement evolving from 4.5 to 7.2 and […]