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Related Articles from SNS
Higher-order exceptional points in a multimode continuum optoacoustic system
arXiv:2606.04671v1 Announce Type: new Abstract: Exceptional points appear in non-Hermitian systems as degeneracies, where not only eigenvalues but also eigenvectors coalesce. They are of great theoretical and experimental interest due to their exotic topological properties and enhanced sensitivity to perturbations.
ECB Says Consumer Inflation Expectations Ease But Stay Elevated
The European Central Bank (ECB) headquarters, center, beyond pedestrians crossing a street in Frankfurt, Germany, on Monday, May 23, 2022. While ECB policy makers have increasingly coalesced around the prospect of a first hike at their July 21 meeting in recent weeks, they have barely mentioned the possibility of a more aggressive half-point move such as the US Federal Reserve delivered this month.
Statistical inference of the Tree of Blobs of a phylogenetic network from quartet concordance factors
A phylogenetic network represents evolutionary relationships involving hybridization, gene flow, or admixture. While the full network may not be identifiable from genomic data under common coalescent models, its tree of blobs, depicting only the tree-like portions of the network structure, is. We introduce ECToBlob (Edge Contraction for Tree of Blobs), a new statistically-consistent algorithm to estimate the tree of blobs from quartet concordance factors.
GLP: A Grassroots, Multiagent, Concurrent, Logic Programming Language for AI (Full Version)
arXiv:2510.15747v3 Announce Type: replace Abstract: A grassroots platform is a multiagent distributed system in which multiple independent instances can form and operate independently of each other and of any global resource, yet may coalesce into ever larger instances, possibly resulting in a single global instance. Grassroots platforms aim to offer an egalitarian/democratic alternative to centralised/autocratic and decentralised/plutocratic global platforms. Here, we present Grassroots...
OnlyDense: Reduced-Order Modeling for Lagrangian simulation
arXiv:2606.09065v1 Announce Type: new Abstract: In science and engineering, Lagrangian simulation methods such as Smooth Particle Hydrodynamics (SPH) or Material Point Method (MPM) are often employed to study the behavior of dynamic systems. However, these methods can be prohibitively computationally expensive, particularly when simulating multi-scale spatial or temporal phenomena, e.g., void growth and coalescence within macro-scale geometries, structural failure of spacecraft components...
Arbitrary-Order Scattering Exceptional Points in Configurable Non-Hermitian Zero-Index Materials
new Abstract: Scattering exceptional points (EPs) are non-Hermitian degeneracies where the eigenvalues and eigenvectors of scattering matrices coalesce, enabling many intriguing phenomena in optical systems. Higher-order scattering EPs are particularly notable for their ultrasensitive response to perturbations, yet achieving flexible, arbitrary-order control remains challenging. Here, we propose a configurable non-Hermitian zero-index material (ZIM) network that enables arbitrary-order...
Astronomers uncover statistical evidence for recoiling supermassive black holes
Galactic collisions are events of breathtaking proportions. The supermassive black holes (SMBHs) at their centers plunge into a chaotic orbital dance that eventually coalesce into a single remnant. On their way to that point, they could eventually get "kicked" out of the center of their galaxy—and finding these "recoiling" black holes has been a challenge of cosmology for decades.
Multi-dimensional parameter space of higher-order exceptional points induced by Brillouin optoacoustics
arXiv:2606.05064v1 Announce Type: new Abstract: Exceptional points (EPs) are degeneracies in the spectrum of non-Hermitian systems, where both the eigenvalues and eigenvectors coalesce. In the vicinity of an n-th order EP, the eigenvalues generally show n-th-root dependence on the system parameters, making EPs potentially promising candidates for ultra-sensitive measurements.
Deep reinforcement learning with spatial and temporal awareness for active boundary control of buoyancy-driven convection
arXiv:2606.06191v1 Announce Type: new Abstract: Deep reinforcement learning (DRL) applied to thermal convection control consistently produces \textit{degenerate actuation}: wall-temperature policies whose outputs are saturated, pseudo-random, or spatially incoherent. Two compounding deficiencies are responsible: multilayer-perceptron policies that discard spatial flow structure, and memoryless policies that cannot distinguish self-induced flow changes from background evolution. Together they...
Californians vote in fiercely contested gubernatorial and congressional primaries
Californians vote in fiercely contested gubernatorial and congressional primaries Californians have their final chance to vote Tuesday in a fiercely contested gubernatorial primary ahead of Democratic Governor Gavin Newsom’s mandate coming to an end at the end of the year. The state's open-primary system, which allows the two best-performing candidates to advance regardless of party, has raised fears among Democrats that a split vote will pave the way for a Republican victory. California's...