Tootfinder

Waves V16 Is Here https://sonicstate.com/news/2025/06/24/waves-v16-is-with-us/?utm_source=dlvr.it&utm_content=muz4now/magazine/(Mostly Music) Tech&amp…

Waves V16 Is Here - Latest version of the plugins is refined for improved workflow and creativity
Latest version of the plugins is refined for improved workflow and creativity

Statistical analysis of interplanetary shock waves measured by a Solar Wind Analyzer and a magnetometer onboard the Solar Orbiter Mission in 2023
Oleksandr Yakovlev, Oleksiy Dudnik, Anna Wawrzaszek
https://arxiv.org/abs/2506.19986

Statistical analysis of interplanetary shock waves measured by a Solar Wind Analyzer and a magnetometer onboard the Solar Orbiter Mission in 2023
Interplanetary (IP) shock waves are greatly interesting, as they represent significant phenomena in near-Earth space and are direct drivers of geomagnetic and radiation storms. Moreover, various data and parameters are being explored for the identification and characterization of these waves. The spatial dimensions of shock waves vary significantly with the conditions and parameters of the propagating medium. For example, the radii of curvature of the shock wave fronts can vary by several hundr…

Waves V16 Is Here
#MusicTech #MusicianTips

Waves V16 Is Here - Latest version of the plugins is refined for improved workflow and creativity
Latest version of the plugins is refined for improved workflow and creativity

Waves in ice
Luke G Bennetts
https://arxiv.org/abs/2505.18635 https://arxiv.org/pdf/2505.18635

Waves in ice
Ocean surface waves can propagate long distances through regions containing floating ice covers. The impacts ocean waves have on the ice covers are of interest in the climate change era, as the polar regions experience pressure from rising temperatures. This chapter provides a review of observations and theoretical models for ocean wave propagation through the marginal ice zone, landfast ice and ice shelves. It traces the historical evolution of the field, from seminal work in the 1970s-80s up …

Die aktuelle #Hitzewelle in den #USA betrifft über 150 Millionen Menschen und ist ein deutliches Zeichen für den Einfluss des menschengemachten #Klimawandel​s.
Die Nächte bleiben ungewöhnlich …

Heat waves are getting more dangerous with climate change — and we may still be underestimating them
The intensifying and expansive heat wave affecting around 150 million people in the United States from Wisconsin to Washington, DC, bears the hallmarks of human-caused global warming.

Inhomogeneous plane waves in attenuative anisotropic porous media
Lingli Gao, Weijian Mao, Qianru Xu, Wei Ouyang, Shaokang Yang, Shijun Cheng
https://arxiv.org/abs/2506.20389

Inhomogeneous plane waves in attenuative anisotropic porous media
We investigate the propagation of inhomogeneous plane waves in poro-viscoelastic media, explicitly incorporating both velocity and attenuation anisotropy. Starting from classical Biot theory, we present a fractional differential equation describing wave propagation in attenuative anisotropic porous media that accommodates arbitrary anisotropy in both velocity and attenuation. Then, instead of relying on the traditional complex wave vector approach, we derive new Christoffel and energy balance e…

So, the Gemini stuff pissed me off enough to disable updates on my phone, but now it looks like I'm overreacting
https://www.engadget.com/ai/what-do-googles-gemini-privacy-changes-actually-mean-200819778.html
Except I don…

What do Google's Gemini privacy changes actually mean?
An email sent to the AI chatbot users made waves in the tech press.

Two-dimensional transition metal selenides family M2Se: A platform for superconductivity, band topology, and charge density waves
Shu-Xiang Qiao, Kai-Yue Jiang, Yu-Lin Han, Na Jiao, Ying-Jie Chen, Hong-Yan Lu, Ping Zhang
https://arxiv.org/abs/2506.20265

Two-dimensional transition metal selenides family M2Se: A platform for superconductivity, band topology, and charge density waves
MXenes and MBenes, which are two-dimensional (2D) transition metal carbides/nitrides and borides, have been extensively studied for their impressive properties. Recently, we reported a family of transition metal sulfides MSene (M2S) with rich properties [Phys. Rev. B 111, L041404 (2025)], it is worth studying whether selenides with similar structure also have rich properties. In this work, through high-throughput screening, we present a novel family of 2D transition metal selenides, M2Se. In th…

The mixing of internal gravity waves and lithium production in intermediate-mass AGB stars
Zhijun Wang, Guoliang L\"u, Chunhua Zhu, Sufen Guo, Helei Liu, Xizhen Lu
https://arxiv.org/abs/2506.20360

The mixing of internal gravity waves and lithium production in intermediate-mass AGB stars
Context: Intermediate-mass asymptotic giant branch (AGB) stars influence Galactic lithium evolution by ejecting surface material (including Li) via stellar winds. Internal gravity waves (IGW), excited by convective motions, drive turbulent mixing in non-convective regions, altering stellar surface and wind chemistry. Aims: Investigate IGW-induced extra-mixing in the radiative zone between thermal pulses and convective envelopes of AGB stars and its impact on Li production. Derive the total Li c…

i'm finna hike up to the used record store and see if i can sell some records
Machine-generated ALT: three photos showcase a collection of 12 diverse vinyl records, spanning genres such as rock, soul, jazz, Christmas music, and contemporary pop, featuring artists like Lucinda Williams, Frank Sinatra, Chick Corea, Ramsey Lewis, Lana Del Rey, Mavis Staples, and Hugh Masekela.

Electrically-gated laser-induced spin dynamics in magneto-electric iron garnet at room temperature
T. T. Gareev, N. E. Khokhlov, L. K\"orber, A. P. Pyatakov, A. V. Kimel
https://arxiv.org/abs/2506.20366

Electrically-gated laser-induced spin dynamics in magneto-electric iron garnet at room temperature
Ultrafast pump-probe imaging reveals that the efficiency of optical excitation of coherent spins waves in epitaxial iron garnet films can be effectively controlled by an external electric field at room temperature. Although a femtosecond laser pulse alone does not excite any pronounced coherent spin oscillations, an electrical gating with the field of 0.5 MV/m dramatically changes the outcome in a laser-induced launching of spin waves. The effect, demonstrated under room-temperature conditions,…

UK risks more extreme, prolonged heat waves in future: Study #UnitedKingdom

UK risks more extreme, prolonged heat waves in future: Study
The UK could experience more frequent extreme and prolonged heat due to climate change, its meteorological office said Wednesday, as the country braced for its first heat wave of the year.

Detectability of dark matter density distribution via gravitational waves from binary black holes in the Galactic center
Zhijin Li, Xiao Guo, Zhoujian Cao, Yun-Long Zhang
https://arxiv.org/abs/2506.19327

Detectability of dark matter density distribution via gravitational waves from binary black holes in the Galactic center
The fundamental nature of dark matter (DM) remains unknown, with significant uncertainties in its density profile. DM environments surrounding massive binary black holes (BBHs) modify their orbital dynamics, thereby altering gravitational wave (GW) emissions. For BBH systems at the Galactic Center, dynamical friction induced by DM spikes could produce detectable deviations in GW spectra, potentially observable by future space-based detectors. To address the uncertainties in the Galactic Center'…

Adding equatorial-asymmetric effects for spin-precessing binaries into the SEOBNRv5PHM waveform model
H\'ector Estell\'es, Alessandra Buonanno, Raffi Enficiaud, Cheng Foo, Lorenzo Pompili
https://arxiv.org/abs/2506.19911

Adding equatorial-asymmetric effects for spin-precessing binaries into the SEOBNRv5PHM waveform model
Gravitational waves from spin-precessing binaries exhibit equatorial asymmetries absent in non-precessing systems, leading to net linear momentum emission and contributing to the remnant's recoil. This effect, recently incorporated into only a few waveform models, is crucial for accurate recoil predictions and improved parameter estimation. We present an upgrade to the SEOBNRv5PHM model -- SEOBNRv5PHM_w/asym -- which includes equatorial asymmetric contributions to the l=m<=4 waveform modes in t…

Detecting Collective Excitations in Self-Gravitating Bose-Einstein Condensates via Faraday Waves
Ning Liu, Guodong Cheng
https://arxiv.org/abs/2506.18593 h…

Detecting Collective Excitations in Self-Gravitating Bose-Einstein Condensates via Faraday Waves
We propose Faraday waves as a probe for collective excitations in self-gravitating Bose-Einstein condensates (SGBECs), driven by periodic modulation of the $s$-wave scattering length. Linear stability analysis of the driven Gross-Pitaevskii-Newton equations reveals that parametric instability follows a Mathieu-like equation, with Faraday waves emerging resonantly when half the driving frequency matches the collective excitation frequency of the SGBEC. This framework yields a stability phase dia…

Growth rate and energy dissipation in wind-forced breaking waves
Nicol\`o Scapin, Jiarong Wu, J. Thomas Farrar, Bertrand Chapron, St\'ephane Popinet, Luc Deike
https://arxiv.org/abs/2506.17802

Growth rate and energy dissipation in wind-forced breaking waves
We investigate the energy growth and dissipation of wind-forced breaking waves using direct numerical simulations of the coupled air-water Navier-Stokes equations. We vary the wind friction velocity over the wave speed $u_\ast/c$ up to 1. A turbulent wind boundary layer drives the growth of a pre-existing narrowband wave field until it breaks and transfers energy into the water column. Under sustained wind forcing, the wave field then resumes growth. We separately analyze energy transfers durin…

Formation and construction of large variational shock waves for 1-D $n\times n$ quasilinear hyperbolic conservation systems
Huicheng Yin, Wanqing Zhu
https://arxiv.org/abs/2506.19313

Formation and construction of large variational shock waves for 1-D $n\times n$ quasilinear hyperbolic conservation systems
In the paper [Li Jun, Xu Gang, Yin Huicheng, On the blowup mechanism of smooth solutions to 1D quasilinear strictly hyperbolic systems with large variational initial data, Nonlinearity 38 (2025), No.2, 025016], for the 1-D $n\times n$ ($n\geqslant 3$) strictly hyperbolic system $\partial_tv+F(v)\partial_xv=0$ with some classes of large variational initial data $v(x, 0)$, the geometric blowup mechanism and the detailed singularity behaviours of $\partial_{x,t}v$ near the blowup point are studied…

Waves of souls leapfrogging through the liminal spaces between the bits of the universe. Some stop here for a while.

Polarization ratios of turbulent Langmuir/$\mathcal{Z}$-mode waves generated by electron beams in magnetized solar wind plasmas
Francisco Javier Polanco-Rodr\'iguez, Catherine Krafft, Philippe Savoini
https://arxiv.org/abs/2506.18429

Polarization ratios of turbulent Langmuir/$\mathcal{Z}$-mode waves generated by electron beams in magnetized solar wind plasmas
The polarization ratios $F=|E_\perp|^2/|E|^2$ of beam-generated turbulent Langmuir/$\mathcal{Z}$-mode ($\mathcal{LZ}$) waves and electromagnetic emissions radiated at plasma frequency $ω_p$ by such sources are studied in weakly magnetized and randomly inhomogeneous plasmas owing to large-scale and long-term 2D/3V Particle-In-Cell simulations with parameters relevant to type III solar radio bursts. Statistical studies using waveforms recorded by virtual satellites are perfor…

Absence of reflectivity of the phonon-polariton at the SiC surface from the metal mask edge
V. S. Ivchenko, D. V. Kazantsev, V. A. Ievleva, D. A. Matienko, E. A. Kazantseva, A. Yu. Kuntsevich
https://arxiv.org/abs/2506.19080

Absence of reflectivity of the phonon-polariton at the SiC surface from the metal mask edge
Surface phonon polariton (SPhP) waves are excited at the silicon carbide ($SiC$) surface under irradiation of light close to the lattice resonance frequency. Metal mask at the surface blocks irradiation of certain areas and thus allows tuning standing or propagating wave pattern and, thus, open opportunities for surface polariton optic devices. In this study we show by means of scanning near-field microscopy that the edge of such a mask reflects SPhP waves negligibly. This condition differs dra…

An array of bulk-acoustic-wave sensors as a high-frequency antenna for gravitational waves
G. Albani, M. Borghesi, L. Canonica, R. Carobene, F. De Guio, M. Faverzani, E. Ferri, R. Gerosa, A. Ghezzi, A. Giachero, C. Gotti, D. Labranca, L. Mariani, A. Nucciotti, G. Pessina, D. Rozza, T. Tabarelli de Fatis
https://arxiv.org/abs/250…

An array of bulk-acoustic-wave sensors as a high-frequency antenna for gravitational waves
In their simplest form, bulk acoustic wave (BAW) devices consist of a piezoelectric crystal between two electrodes that transduce the material's vibrations into electrical signals. They are adopted in frequency control and metrology, with well-established standards at frequencies of 5~MHz and above. Their use as a resonant-mass strain antenna for high-frequency gravitational waves has been recently proposed (Goryachev and Tobar, 2014). The estimated power spectral density sensitivity at the res…

Radial Attention: $O(n\log n)$ Sparse Attention with Energy Decay for Long Video Generation
Xingyang Li, Muyang Li, Tianle Cai, Haocheng Xi, Shuo Yang, Yujun Lin, Lvmin Zhang, Songlin Yang, Jinbo Hu, Kelly Peng, Maneesh Agrawala, Ion Stoica, Kurt Keutzer, Song Han
https://arxiv.org/abs/2506.19852…

Radial Attention: $O(n\log n)$ Sparse Attention with Energy Decay for Long Video Generation
Recent advances in diffusion models have enabled high-quality video generation, but the additional temporal dimension significantly increases computational costs, making training and inference on long videos prohibitively expensive. In this paper, we identify a phenomenon we term Spatiotemporal Energy Decay in video diffusion models: post-softmax attention scores diminish as spatial and temporal distance between tokens increase, akin to the physical decay of signal or waves over space and time …

Escape and transport in chaotic motion of charged particles in a magnetized plasma under the influence of two and three modes of drift waves
P. Haerter, E. D. Leonel, R. L. Viana
https://arxiv.org/abs/2506.20013

Escape and transport in chaotic motion of charged particles in a magnetized plasma under the influence of two and three modes of drift waves
This study investigates how two- and three-wave configurations govern particle escape and transport in tokamak edge plasmas. Using a Hamiltonian model derived from drift-wave turbulence, we analyze test particle dynamics through Poincaré maps, fractal escape basins, and entropy metrics. Introducing a third wave increases basin entropy, enhancing particle escape rates while reducing basin boundary entropy, indicative of suppressed basin mixing. Escape time analyses reveal resonant scattering di…

Radiatively Corrected Starobinsky Inflation and Primordial Gravitational Waves in Light of ACT Observations
Waqas Ahmed, Mansoor Ur Rehman
https://arxiv.org/abs/2506.18077

Radiatively Corrected Starobinsky Inflation and Primordial Gravitational Waves in Light of ACT Observations
Nonminimal coupling between the inflaton and the Ricci scalar plays a crucial role in shaping the predictions of single-field inflationary models. While a quartic potential with such coupling represents one of the simplest realizations compatible with cosmological observations, it generically receives important radiative corrections when the inflaton interacts with other fields, particularly those involved in the reheating process. In this work, we focus on radiative corrections arising from bo…

LunGao – Ago
#ambient #by

Study finds planetary waves linked to wild summer weather have tripled since 1950 https://phys.org/news/2025-06-planetary-linked-wild-summer-weather.html
Study finds planetary waves linked to wild summer weather have tripled since 1950

Study finds planetary waves linked to wild summer weather have tripled since 1950
Climate change has tripled the frequency of atmospheric wave events linked to extreme summer weather in the last 75 years and that may explain why long-range computer forecasts keep underestimating the surge in killer heat waves, droughts and floods, a new study says.

Perturbing AGN Accretion Disks with Stars and Moderately Massive Black Holes: Implications for Changing-Look AGN and Quasi-Periodic Eruptions
Sierra A. Dodd, Xiaoshan Huang, Shane W. Davis, Enrico Ramirez-Ruiz
https://arxiv.org/abs/2506.19900

Perturbing AGN Accretion Disks with Stars and Moderately Massive Black Holes: Implications for Changing-Look AGN and Quasi-Periodic Eruptions
We present a model that explains some extreme variability phenomena observed in active galactic nuclei (AGN). In this model, an orbiting companion interacts with the accretion disk surrounding the central supermassive black hole (SMBH). This interaction excites spiral density waves, leading to bursts of mass inflow lasting a few orbital timescales, whose mass content depends sensitively on the sphere of influence of the orbiting companion. To explain changing-look (CL) AGN, we find that lighter…

Anisotropy-Induced Magnetic Field Generation in Bidimensional Materials
Diogo Sim\~oes, Hugo Ter\c{c}as, Jorge Ferreira
https://arxiv.org/abs/2506.21464 ht…

Anisotropy-Induced Magnetic Field Generation in Bidimensional Materials
We investigate an electromagnetic instability in two-dimensional materials arising from an anisotropy of the Fermi surface, utilizing a kinetic model accounting for the effects of the values of temperature, chemical potential and anisotropy ratio, as well as considering both linear and quadratic low-energy band structures. The wavenumber-dependent growth-rate of these modes is derived in the linear regime, and their confinement, contrasting with stable electromagnetic waves in these systems, is…

Modeling the influences of non-local connectomic projections on geometrically constrained cortical dynamics
Rishikesan Maran, Eli J. M\"uller, Ben D. Fulcher
https://arxiv.org/abs/2506.19800

Modeling the influences of non-local connectomic projections on geometrically constrained cortical dynamics
The function and dynamics of the cortex are fundamentally shaped by the specific wiring configurations of its constituent axonal fibers, also known as the connectome. However, many dynamical properties of macroscale cortical activity are well captured by instead describing the activity as propagating waves across the cortical surface, constrained only by the surface's two-dimensional geometry. It thus remains an open question why the local geometry of the cortex can successfully capture macrosc…

Hierarchical constraints on gravitational waves from horizonless compact objects
Rajrupa Mondal, Julian Westerweck, Yotam Sherf, Collin D. Capano
https://arxiv.org/abs/2506.17215 …

Hierarchical constraints on gravitational waves from horizonless compact objects
We use the data of several promising gravitational wave observations to obtain increasingly stringent bounds on near-horizon deviations of their sources from the Kerr geometry. A range of horizonless compact objects proposed as alternatives to black holes of general relativity would possess a modified gravitational wave emission after the merger. Modelling these objects by introducing reflection of gravitational waves near the horizon, we can measure deviations from Kerr in terms of a single ad…

An electric circuital analysis of laboratory plasma sheath fluctuations and propagations
Subham Dutta, Pralay Kumar Karmakar
https://arxiv.org/abs/2505.19553

An electric circuital analysis of laboratory plasma sheath fluctuations and propagations
The effective inductive (L), capacitive (C), and resistive (R) behavior of a plasma sheath in a conjoint coupled form is well familiar among plasma physics communities. A dynamic sheath instability in laboratory plasmas is systematically modelled herein as an electrical series-resonance LCR circuit of the above kind. It theoretically yields experimentally observed findings on coexistent plasma sheath oscillation, electric current perturbation, and subsequent plasma sheath waves (PSWs). The plas…

«Sometimes a charity where volunteers do all the work forgets who does all the work and that these are volunteers, not minions. If someone waves a bit of money at them.»
https://pivot-to-ai.com/2025/06/19/google-bribes-inaturalist-to-use-generative-ai-volunteers-quit-in-outrage/

Gear-based Metamaterials for Extraordinary Bandgap Tunability
Xin Fang, Jihong Wen, Dianlong Yu, Peter Gumbsch, Huajian Gao
https://arxiv.org/abs/2506.20110

Gear-based Metamaterials for Extraordinary Bandgap Tunability
Metamaterials can be engineered with tunable bandgaps to adapt to dynamic and complex environments, particularly for controlling elastic waves and vibration. However, achieving wide-range, seamless, reversible, in-situ and robust tunability remains challenging and often impractical due to limitations in bandgap mechanisms and design principles. Here, we introduce gear-based metamaterials with unprecedented bandgap tunability. Our approach leverages Taiji planetary gear systems as variable-frequ…

"When heat waves hit, clownfish shrink to survive, study finds"
#ClownFish #Fish #Animals #Climate

When heat waves hit, clownfish shrink to survive, study finds
Clownfish are known for their remarkable ability to change sex to survive. Turns out, one species, clown anemonefish (Amphiprion percula), popularized in the Pixar hit movie Finding Nemo, have yet another surprising survival trick up their fins: they can also shrink themselves to weather heat waves and dodge social squabbles. When things get hot and […]

CAM-NET: An AI Model for Whole Atmosphere with Thermosphere and Ionosphere Extension
Jiahui Hu, Wenjun Dong
https://arxiv.org/abs/2506.19340 https://

CAM-NET: An AI Model for Whole Atmosphere with Thermosphere and Ionosphere Extension
We present Compressible Atmospheric Model-Network (CAM-NET), an AI model designed to predict neutral atmospheric variables from the Earth's surface to the ionosphere with high accuracy and computational efficiency. Accurate modeling of the entire atmosphere is critical for understanding the upward propagation of gravity waves, which influence upper-atmospheric dynamics and coupling across atmospheric layers. CAM-NET leverages the Spherical Fourier Neural Operator (SFNO) to capture global-scale …

See How Marine Heat Waves Are Spreading Across the Globe https://www.nytimes.com/2025/06/09/climate/see-how-marine-heat-waves-are-spreading-across-the-globe.html

Ocean Temperatures Are Increasing Around the World. See Where.
Sea surface temperatures in 2024 broke records and about a quarter of the world’s oceans are experiencing temperatures that qualify as a marine heat wave.

'The Responsible AI Ecosystem: Seven Lessons from the BRAID Landscape Study'
Report just released: https://braiduk.org/the-responsible-ai-ecosystem-seven-lessons-from-the-braid-landscape-study

The Responsible AI Ecosystem: Seven Lessons from the BRAID Landscape Study

This https://arxiv.org/abs/2502.12166 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Coupling Light Waves to Gravitational Waves
We demonstrate analytically that gravitational waves, upon interacting with co-propagating electromagnetic radiation in a plasma, induce distinctive sidebands on the modulated light, thereby providing a detectable signature of their presence. Employing a fully covariant coupled-wave framework, we envision gravitational waves as phase-insensitive ``luminal moving gratings'' and derive explicit phase-matching conditions that articulate such an interaction whilst conserving both energy and momentu…

A corresponding relationship between nonlinear Hermitian systems and linear non-Hermitian models
Yu-Hao Wang, Yan-Hong Qin, Jie Liu, Li-Chen Zhao
https://arxiv.org/abs/2506.19649 …

A corresponding relationship between nonlinear Hermitian systems and linear non-Hermitian models
We note that the non-orthogonality of states and their coincidence at the degeneracy point are both admitted by nonlinear Hermitian systems and linear non-Hermitian systems. These striking characteristics motivate us to re-investigate the localized waves of nonlinear Hermitian systems and the eigenvalue degeneracies of linear non-Hermitian models, based on several well-known Lax integrable systems that have wide applications in nonlinear optics. We choose nonlinear Schrodinger equation integrab…

On quasi-periodic decameter radio emission from Jupiter related to Ganymede
V. E. Shaposhnikov, V. V. Zaitsev
https://arxiv.org/abs/2506.18581 https://

On quasi-periodic decameter radio emission from Jupiter related to Ganymede
The paper discusses the possibility of implementing a plasma generation mechanism in a source of decameter radio emission associated with Ganymede and an explanation based on this mechanism of forming quasi-periodic sequences of bursts of this radiation. According to the discussed model, the registered quasi-periodic sequences of radiation pulses are a consequence of implementing in the source a pulsating mode of plasma wave conversion into extraordinary electromagnetic waves with a small refra…

Cowboy Roundup: Unexpected star could emerge, Defense making positive waves https://www.si.com/nfl/cowboys/news/unexpected-star-could-emerge-dallas-cowboys-defense-making-positive-waves

Ahoy, matey!
If ye hold the map to Dollface and cherish the wild waves of the digital sea, then hoist the sails and bring others aboard this vessel.
-IMDb:
https://www.imdb.com/title/tt7661046/
- btdig:

Non-linear estimators for the observation and stabilisation of falling liquid films
Oscar Holroyd, Radu Cimpeanu, Susana N. Gomes
https://arxiv.org/abs/2506.16987

Non-linear estimators for the observation and stabilisation of falling liquid films
Falling liquid films are complex physical processes modelled by infinite-dimensional dynamical systems. The interfacial behaviour is characterised by the Reynolds number, a nondimensional parameter, and above a critical value the uniform film becomes unstable and travelling waves occur. By injecting and removing fluid from the base at discrete locations, we aim to stabilise otherwise unstable flat interfaces, with the additional limitation that observations of the state are restricted to finite…

Aktueller Titel: Waves Under Water – Serpents And The Tree
#DunkleEchos – jetzt live bei https://www.mixcloud.com/live/thopan

THOPAN on Mixcloud Live
Broadcast live to your community of fans and tune in direct to creators from every genre

we need to return,,,

I continue my practice of writing back to posts on social media. Also its antidote: writing back to works of art served up at random. It’s a little like surfing, taking the waves as they come. It’s a little like dancing. It’s one way to reclaim my attention, one way to stay alive to the present.
https://

More Fresh Hells & A Few Heavens
Brief responses to social media posts (hells) and random paintings (heavens).

Gravitational Waves from Spectator Scalar Fields
Marcos A. G. Garcia, Sarunas Verner
https://arxiv.org/abs/2506.12126 https://arxiv.o…

Gravitational Waves from Spectator Scalar Fields
We propose a novel mechanism for gravitational wave (GW) production sourced by spectator scalar fields during inflation. These fields, while not driving cosmic expansion, generate blue-tilted isocurvature fluctuations that naturally satisfy current CMB constraints at large scales while producing enhanced power spectra at smaller scales accessible to GW detectors. The resulting GW spectrum spans an exceptionally broad frequency range from $10^{-20}$ to $1$ Hz, with amplitudes ranging from $Ω_{\…

On 17 June the European Space Agency (ESA) and OHB System AG sealed their agreement to build ESA's Laser Interferometer Space Antenna, #LISA: https://www.esa.int/Science_Exploration/Space_Science/LISA/Construction_of_ESA_s_ambitious_LISA_mission_begins - a bold scientific enterprise, the triple-spacecraft mission will be the first space-based observatory to study gravitational waves.

🇺🇦 #NowPlaying on KEXP's #MiddayShow
Museums:
🎵 In Waves
#Museums
https://museums-mu.bandcamp.com/track/in-waves
https://open.spotify.com/track/1bv3Uf6i9W0iinKn7imxjd

Gravitational waves from b-EMRIs: Doppler shift and beaming, resonant excitation, helicity oscillations and self-lensing
Jo\~ao S. Santos, Vitor Cardoso, Jos\'e Nat\'ario, Maarten van de Meent
https://arxiv.org/abs/2506.14868

Gravitational waves from b-EMRIs: Doppler shift and beaming, resonant excitation, helicity oscillations and self-lensing
We study gravitational waves from a stellar-mass binary orbiting a spinning supermassive black hole, a system referred to as a binary extreme mass ratio inspiral (b-EMRI). We use Dixon's formalism to describe the stellar-mass binary as a particle with internal structure, and keep terms up to quadrupole order to capture the generation of gravitational waves by the inner motion of the stellar-mass binary. The problem of emission and propagation of waves is treated from first principles using blac…

Scattering and Chirping at Accelerated Interfaces
Klaas De Kinder, Amir Bahrami, Christophe Caloz
https://arxiv.org/abs/2506.19575 https://

Scattering and Chirping at Accelerated Interfaces
Space-time varying media with moving interfaces unlock new ways to manipulate electromagnetic waves. Yet, analytical solutions have been mostly limited to interfaces moving at constant velocity or constant proper acceleration. Here, we present exact scattering solutions for an arbitrarily accelerating interface, derived directly in the laboratory frame through a suitable change of variables. We show that acceleration introduces rich effects that do not occur with uniform motion, including trans…

Omnidirectionally manipulated skyrmions in an orientationally chiral system
Jiahao Chen, Wentao Tang, Xingzhou Tang, Yang Ding, Jie Ni, Yuxi Chen, Bingxiang Li, Rui Zhang, Juan de Pablo, Yanqing Lu
https://arxiv.org/abs/2506.16781

Omnidirectionally manipulated skyrmions in an orientationally chiral system
Skyrmions, originally from condensed matter physics, have been widely explored in various physical systems, including soft matter. A crucial challenge in manipulating topological solitary waves like skyrmions is controlling their flow on demand. Here, we control the arbitrary moving direction of skyrmions in a chiral liquid crystal system by adjusting the bias of the applied alternate current electric field. Specifically, the velocity, including both moving direction and speed can be continuous…

Einer dieser Tage
tw depression
https://evemassacre.de/breakingthewaves/einer-dieser-tage/

Superfluid dome in the spatially modulated two-dimensional XY model
Feng-Feng Song, Aditya Chugh, Hanggai Nuomin, Naoki Kawashima, Alexander Wietek
https://arxiv.org/abs/2506.16068

Superfluid dome in the spatially modulated two-dimensional XY model
In strongly correlated electron systems, superconductivity and charge density waves often coexist in close proximity, suggesting a deeper relationship between these competing phases. Recent research indicates that these orders can intertwine, with the superconducting order parameter coupling to modulations in the electronic density. To elucidate this interplay, we study a two-dimensional XY model with a periodic modulation of the coupling strength in one spatial direction. Using a combination o…

Liquid-fueled oblique detonation waves induced by reactive and non-reactive transverse liquid jets
Wenhao Wang, Zongmin Hu, Peng Zhang
https://arxiv.org/abs/2506.15247

Liquid-fueled oblique detonation waves induced by reactive and non-reactive transverse liquid jets
This computational study demonstrates the formation of liquid-fueled oblique detonation waves (ODWs) induced by a liquid transverse jet, which is either reactive or non-reactive. The study employs an in-house two-phase supersonic reactive flow solver based on the rhocentralfoam framework of OpenFOAM. The findings emphasize the essential role of transverse jets in enabling successful ODW formation under conditions where detonation would otherwise fail. Specifically, the jet-inflow momentum ratio…

Discovery of magnon self-interaction in a strongly driven antiferromagnet
David Rohrbach, Zhuquan Zhang, Takayuki Kurihara, Keith A. Nelson
https://arxiv.org/abs/2506.19040

Discovery of magnon self-interaction in a strongly driven antiferromagnet
Nonlinear dynamics govern a wide array of natural phenomena and are essential for understanding nonequilibrium behaviors in condensed matter systems. In magnetically ordered materials, magnons - the quanta of spin waves - exhibit intrinsic nonlinearities that are of great interest in fundamental research and practical applications. Despite progress in the nonlinear control of magnon modes in antiferromagnetic materials, the transition from perturbative to non-perturbative regimes of magnon cohe…

Diffusion-free boundary conditions for the Navier-Stokes equations
Emmanuel Dormy, David Gerard-Varet
https://arxiv.org/abs/2506.17749 https://

Diffusion-free boundary conditions for the Navier-Stokes equations
We provide a mathematical analysis of the `diffusion-free' boundary conditions recently introduced by Lin and Kerswell for the numerical treatment of inertial waves in a fluid contained in a rotating sphere. We consider here the full setting of the nonlinear Navier-Stokes equation in a general bounded domain $Ω$ of $\mathbb{R}^d$, $d=2$ or $3$. We show that diffusion-free boundary conditions $$ Δu \cdot τ\vert_{\partial Ω} = 0, \quad u \cdot n\vert_{\partial Ω} = 0 \quad \text{ when } d=2,…

Laser-Driven Annular Shock Waves as Laboratory Analogues of $w$CDM Cosmologies and Cosmological Gravitational Waves
Felipe A. Asenjo, Felipe Veloso, Julio C. Valenzuela
https://arxiv.org/abs/2506.15493

Laser-Driven Annular Shock Waves as Laboratory Analogues of $w$CDM Cosmologies and Cosmological Gravitational Waves
We demonstrate that the experimental evolution of an annular, laser-driven plasma shock wave, expanding over time and undergoing self-interaction gives rise to multiple shock structures that evolve analogously to a multicomponent cosmological universe. Different propagation trajectories along the shock surface correspond to various forms of $w$CDM cosmologies, enabling the study of scenarios ranging from simple radiation- or matter-dominated universes to those including dark energy. We further …

Impact of Gravity Waves From Tropospheric and Non-tropospheric Sources on the Middle and Upper Atmosphere and Comparison with ICON/MIGHTI Winds
Erdal Yi\u{g}it, Alexander S. Medvedev, Ayden L. S. Gann, Gary P. Klaassen, Douglas E. Rowland
https://arxiv.org/abs/2506.14918

Impact of Gravity Waves From Tropospheric and Non-tropospheric Sources on the Middle and Upper Atmosphere and Comparison with ICON/MIGHTI Winds
We study the dynamical and thermal roles of internal gravity waves generated in the troposphere and above using the Coupled Middle Atmosphere Thermosphere-2 General Circulation Model. This model incorporates the whole atmosphere nonlinear gravity wave parameterization and its extension to include non-tropospheric sources. We conducted model experiments for northern summer solstice conditions, first including only tropospheric sources, then including sources localized at 50 and 90 km, and unifor…

This https://arxiv.org/abs/2311.02275 has been replaced.
initial toot: https://mastoxiv.page/@arXi…

Rapid topographic scatter of near-inertial waves generated by storms
Internal waves propagate on the ocean's stratification, carrying energy and redistributing momentum through the ocean. When internal waves break, they contribute to diapycnal mixing in the ocean interior, but this breaking behaviour depends upon the scale of the waves. Low-mode internal waves have larger horizontal and vertical scales, and thus break less readily than higher-mode waves. The scattering of internal waves by topography is an important mechanism in transferring internal wave energy…

This https://arxiv.org/abs/2405.02199 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Alfvén Wave Conversion to Low Frequency Fast Magnetosonic Waves in Magnetar Magnetospheres
Rapid shear motion of magnetar crust can launch Alfvén waves into the magnetosphere. The dissipation of the Alfvén waves has been theorized to power the X-ray bursts characteristic of magnetars. However, the process by which Alfvén waves convert their energy to X-rays is unclear. Recent work has suggested that energetic fast magnetosonic (fast) waves can be produced as a byproduct of Alfvén waves propagating on curved magnetic field lines; their subsequent dissipation may power X-ray bursts…

Achieving Optimal Locomotion using Self-Generated Waves
D. O'Donovan, M. D. Bustamante, O. Devauchelle, G. P. Benham
https://arxiv.org/abs/2506.11961 h…

Achieving Optimal Locomotion using Self-Generated Waves
An oscillating body floating at the water surface produces a wave-field of self-generated waves. When the oscillation induces a difference in fore-aft wave amplitude squared, these self-generated waves can be used as a mechanism to propel the body horizontally across the surface (Longuet-Higgins and Stewart 1964). The optimisation of this wave-driven propulsion (WDP) is the interest of this work. To study the conditions necessary to produce optimal thrust we will utilise a shallow water set-up …

Stokes Waves in Water of Finite Depth
Eleanor Byrnes, Bernard Deconinck, Anastassiya Semenova
https://arxiv.org/abs/2506.03436 https://

Stokes Waves in Water of Finite Depth
Periodic water waves of permanent form traveling at constant speed, the so-called Stokes waves, are studied in water of fixed finite depth using methods previously used in water of infinite depth. We apply our methods to waves of varying steepness over a range of fixed depths in order to determine how a number of physical quantities related to the waves change as the steepness of the waves increases. Finally, we examine the Taylor sign condition for these waves, as well as the complex singulari…

Machine Learning Left-Right Breaking from Gravitational Waves
William Searle, Csaba Bal\'azs, Yang Xiao, Yang Zhang
https://arxiv.org/abs/2506.09319 ht…

Machine Learning Left-Right Breaking from Gravitational Waves
First-order phase transitions in the early universe can generate stochastic gravitational waves (GWs), offering a unique probe of high-scale particle physics. The Left-Right Symmetric Model (LRSM), which restores parity symmetry at high energies and naturally incorporates the seesaw mechanism, allows for such transitions -- particularly during the spontaneous breaking of $SU(2)_R \times SU(2)_L \times U(1)_{B-L} \to SU(2)_L \times U(1)_Y$. This initial step, though less studied, is both theoret…

Planetary waves can activate resonant drag instabilities in 3D dusty gaseous discs
Ra\'ul O. Chametla, Yasuhiro Hasegawa, Gennaro D'Angelo
https://arxiv.org/abs/2506.13592

Planetary waves can activate resonant drag instabilities in 3D dusty gaseous discs
Resonant Drag Instabilities (RDIs) in protoplanetary discs are driven by the aerodynamic back-reaction of dust on gas and occur when the relative dust-gas motion resonate with a wave mode intrinsic to the gas fluid. Axisymmetric models indicate that the RDI generates filamentary perturbations, leading to grain clumping and planetesimal formation. Motivated by these findings, we investigate the dust-gas interaction in a non-axisymmetric inviscid protoplanetary disc with an embedded low-mass plan…

Here comes the boom! Studying the effects of rocket launch sonic booms on neighboring communities: #SonicBoom spreads.

🇺🇦 #NowPlaying on KEXP's #90TEEN
Deftones:
🎵 Cherry Waves
#Deftones
https://kaitak.bandcamp.com/track/cherry-waves-deftones-cover
https://open.spotify.com/track/70L6nHORQsblY813yNqUR3

Space-time duality in polariton dynamics
Suheng Xu, Seunghwi Kim, Rocco A. Vitalone, Birui Yang, Josh Swann, Enrico M. Renzi, Yuchen Lin, Taketo Handa, X. -Y. Zhu, James Hone, Cory Dean, Andrea Cavalleri, M. M. Fogler, Andrew J. Millis, Andrea Alu, D. N. Basov
https://arxiv.org/abs/2506.18224

Space-time duality in polariton dynamics
The spatial and temporal dynamics of wave propagation are intertwined. A common manifestation of this duality emerges in the spatial and temporal decay of waves as they propagate through a lossy medium. A complete description of the non-Hermitian wave dynamics in such a lossy system, capturing temporal and spatial decays, necessitates the use of complex-valued frequency and/or wavenumber Eigen-values. Here, we demonstrate that the propagation of polaritons - hybrid light-matter quasiparticles -…

Electromagnetic radiation by turbulent, magnetized and randomly inhomogeneous solar radio sources generated by electron beams
Catherine Krafft, Alexandr Volokitin, Francisco Javier Polanco-Rodr\'iguez, Philippe Savoini
https://arxiv.org/abs/2506.16816

Electromagnetic radiation by turbulent, magnetized and randomly inhomogeneous solar radio sources generated by electron beams
During Type III solar radio bursts, electromagnetic waves are radiated at plasma frequency $ω_p$ and its harmonics by electrostatic wave turbulence generated by electron beams ejected by Sun in randomly inhomogeneous solar wind and coronal plasmas. These emissions, detected since decades by spacecraft and radiotelescopes, are split by the plasma magnetic field into three modes $\mathcal{X}$, $\mathcal{O}$ and $\mathcal{Z}$ of different dispersion, polarization and radiation properties. This wo…

Resolving space-time singularities in spherically symmetric black holes: geodesic completeness, curvature scalars, and tidal forces
Haroldo C. D. Lima Junior, Renan B. Magalh\~aes, Gonzalo J. Olmo, Diego Rubiera-Garcia
https://arxiv.org/abs/2506.17918

Resolving space-time singularities in spherically symmetric black holes: geodesic completeness, curvature scalars, and tidal forces
The existence of black holes in the Universe is nowadays established on the grounds of a blench of astrophysical observations, most notably those of gravitational waves from binary mergers and the imaging of supermassive objects at the heart of M87 and Milky Way galaxies. However, this success of Einstein's General Relativity~(GR) to connect theory of black holes with observations is also the source of its doom, since Penrose's theorem proves that, under physically sensible conditions, the deve…

The Gardner equation and acoustic solitary waves in plasmas
Frank Verheest, Willy A. Hereman
https://arxiv.org/abs/2506.15024 https://

The Gardner equation and acoustic solitary waves in plasmas
Ion-acoustic waves in a dusty plasma are investigated where it is assumed that the ions follow a Cairns distribution and the electrons are Boltzmann distributed. Two theoretical methods are applied: Sagdeev pseudopotential analysis (SPA) and reductive perturbation theory (RPT). Since SPA incorporates all nonlinearities of the model it is the most accurate but deriving soliton profiles requires numerical integration of Poisson's equation. By contrast, RPT is a perturbation method which at second…

Shock formation in 1D conservation laws I: Inviscid structure
John Anderson, Sanchit Chaturvedi, Cole Graham
https://arxiv.org/abs/2506.17148 https://

Shock formation in 1D conservation laws I: Inviscid structure
We study the stability and structure of shock formation in 1D hyperbolic conservation laws. We show that shock formation is stable near shocking simple waves: perturbations form a shock nearby in spacetime. We also characterize the boundary of the classical development in a spacetime neighborhood of the first time singularity. Finally, we describe the precise nature of nondegenerate shock formation through an expansion in homogeneous functions of fractional degree. We use these results in a com…

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Heng-Tao Xu, Yue-Hui Yao, Yong Tang, Yue-Liang Wu
https://arxiv.org/abs/2506.09744

Distinguishing Monochromatic Signals in LISA and Taiji: Ultralight Dark Matter versus Gravitational Waves
Ultralight dark matter (ULDM) is an attractive candidate for cold dark matter, one of the main mysterious components of the Universe. Recent studies suggest that gravitational-wave (GW) laser interferometers can also detect bosonic ULDM fields, which would produce monochromatic signals resembling those from gravitational waves (GWs). Distinguishing between these potential origins therefore would be essential. In this work, we develop a method to address this challenge for space-based GW interfe…

Electric fields and waves in the Venus nightside magnetosphere
Forrest Mozer, Oleksiy Agapitov, Stuart Bale, John Bonnell, Marc Pulupa, Tim Quinn, Andrii Voschchepynets
https://arxiv.org/abs/2505.12618

Electric fields and waves in the Venus nightside magnetosphere
On November 6, 2024, the Parker Solar Probe flew past Venus to make the first accurate electric field measurement in the nightside Venusian magnetosphere. To achieve this result, the electric field antennas were current biased in a way never before experienced by an electric field detector. This biasing requirement, that the positive bias current in the Venus shadow be about equal to the electron thermal current, is discussed and illustrated. About one minute of useful electric f ield data in t…

This https://arxiv.org/abs/2504.16633 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_nli…

Unveiling Solitonic Collisions in Mechanical Metamaterials
Interactions between solitary waves have been pivotal to understanding nonlinear phenomena across various disciplines. The dynamics of rarefaction solitary waves holds great potential, yet their fundamental characteristics and interactions remain only partially understood through experimental means in mechanical metamaterials. Previous studies highlighted their existence and proposed applications, such as waveguides, impact mitigation, and energy harvesting. Challenges, including energy dissipa…

Direct Inference of Nuclear Equation-of-State Parameters from Gravitational-Wave Observations
Brendan T. Reed, Cassandra L. Armstrong, Rahul Somasundaram, Collin Capano, Soumi De, Ingo Tews
https://arxiv.org/abs/2506.15984

Direct Inference of Nuclear Equation-of-State Parameters from Gravitational-Wave Observations
The observation of neutron star mergers with gravitational waves (GWs) has provided a new method to constrain the dense-matter equation of state (EOS) and to better understand its nuclear physics. However, inferring nuclear microphysics from GW observations necessitates the sampling of EOS model parameters that serve as input for each EOS used during the GW data analysis. The sampling of the EOS parameters requires solving the Tolman-Oppenheimer-Volkoff (TOV) equations a large number of times -…

Longitudinal-flexural wave mode conversion via periodically undulated waveguides with constant and graded profiles
Vinicius F. Dal Poggetto, Fabio Nistri, Nicola M. Pugno, Marco Miniaci, Antonio S. Gliozzi, Federico Bosia
https://arxiv.org/abs/2506.17656

Longitudinal-flexural wave mode conversion via periodically undulated waveguides with constant and graded profiles
Wave mode conversion allows to transform energy from one propagating wave type to another at a boundary where a change in material properties or geometry occurs. Converting longitudinal waves to flexural ones is of particular interest in elasticity due to their significant displacement amplitudes, facilitating detection at the surface for practical applications. Typically, the design of wave conversion devices requires (i) the use of locally resonant structures with a spacing much shorter than …

Stochastic background of gravitational waves from cosmic-rays
Aur\'elien Barrau, Juan Garc\'ia-Bellido, Killian Martineau, Daryna Yushchenko
https://arxiv.org/abs/2506.13237

Stochastic background of gravitational waves from cosmic-rays
Cosmic-rays are charged particles moving in magnetic fields. They not only emit well-known synchrotron photons but also gravitational radiation. We clarify the characteristics of the gravitational wave signal in this specific situation and underline some unexpected features. A phenomenological approximation for the radiated power is given. We derive the shape and peaking frequency of the associated stochastic backgrounds of gravitational waves for both electrons and protons, either of galactic …

Polar solitons in a nonpolar chiral soft matter system
Jiahao Chen, Xingzhou Tang, Yang Ding, Susanta Chakraborty, Satoshi Aya, Bingxiang Li, Yanqing Lu
https://arxiv.org/abs/2506.16778

Polar solitons in a nonpolar chiral soft matter system
Polar solitons, i.e., solitonic waves accompanying asymmetry of geometry or phase, have garnered attention in polar systems, such as ferroelectric or magnetoelectric materials, where they play a critical role in topological transitions and nonreciprocal responses to external fields. A key question is whether such polar solitons can emerge in nonpolar systems, where intrinsic polarity is absent. Here, we demonstrate an unprecedented polar soliton with nematic order in a nonpolar and chiral liqui…

Driven phase-mixed Alfv\'en waves in a partially ionized solar plasma
Max McMurdo, Istvan Ballai, Gary Verth, Viktor Fedun
https://arxiv.org/abs/2506.08732

Driven phase-mixed Alfvén waves in a partially ionized solar plasma
Phase mixing has long been understood to be a viable mechanism for expediting the dissipation of Alfvén wave energy resulting in the subsequent heating of the solar atmosphere. To fulfil the conditions necessary for phase mixing to occur, we consider the cross-field gradient in the Alfvén speed as a free parameter in our model. Using a single-fluid description of a partially ionized chromospheric plasma, we explore the efficiency of damping of shear Alfvén waves subject to phase mixing when …

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
Partha Konar, Sudipta Show
https://arxiv.org/abs/2506.08106 https://

Unraveling Freeze-in Dark matter through the echoes of gravitational waves
In the quest to unravel the dark sector, feebly interacting freeze-in dark matter presents an intriguing possibility, plausibly explaining the consistent null results from various dark matter experiments. We propose a unique imprint in the form of gravitational waves generated during the freeze-in production of dark matter from heavy particle decay in the early universe. This characteristic gravitational wave signature can serve as a powerful probe for freeze-in dark matter. Our study indicates…

On the orbital stability of periodic snoidal waves for the $\phi^4-$equation
B. S. Lonardoni, F. Natali
https://arxiv.org/abs/2506.05547 https://

On the orbital stability of periodic snoidal waves for the $ϕ^4-$equation
The main purpose of this paper is to investigate the global well-posedness and orbital stability of odd periodic traveling waves for the $ϕ^4$-equation in the Sobolev space of periodic functions with zero mean. We establish new results on the global well-posedness of weak solutions by combining a semigroup approach with energy estimates. As a consequence, we prove the orbital stability of odd periodic waves by applying a Morse index theorem to the constrained linearized operator defined in the…

Wave Topology in Hall MHD
Alejandro Mesa Dame, Hong Qin, Eric Palmerduca, Yichen Fu
https://arxiv.org/abs/2506.18830 https://arxiv.or…

Wave Topology in Hall MHD
Hall Magnetohydrodynamics (HMHD) extends ideal MHD by incorporating the Hall effect via the induction equation, making it more accurate for describing plasma behavior at length scales below the ion skin depth. Despite its importance, a comprehensive description of the eigenmodes in HMHD has been lacking. In this work, we derive the complete spectrum and eigenvectors of HMHD waves and identify their underlying topological structure. We prove that the HMHD wave spectrum is homotopic to that of id…

Physics-Informed Neural Networks for the Korteweg-de Vries Equation for Internal Solitary Wave Problem: Forward Simulation and Inverse Parameter Estimation
Ming Kang, Hang Li, Qiwen Tan, Zhan Wang, Ruipeng Li, Junfang Zhao, Hui Xiang, Dixia Fan
https://arxiv.org/abs/2506.14236

Physics-Informed Neural Networks for the Korteweg-de Vries Equation for Internal Solitary Wave Problem: Forward Simulation and Inverse Parameter Estimation
Physics-informed neural networks (PINNs) have emerged as a transformative framework for addressing operator learning and inverse problems involving the Korteweg-de Vries (KdV) equation for internal solitary waves. By integrating physical constraints with data-driven optimization, PINNs overcome the critical challenges of parameter unmeasurability in the KdV equation for internal solitary waves in two-layer fluid systems. This work addresses two problems: (1) Operator learning constructs a mappi…

Replaced article(s) found for physics.app-ph. https://arxiv.org/list/physics.app-ph/new
[1/1]:
- Wave-propagation Based Analysis of the Magnetostatic Waves in Ferrite Films Excited by Metallic T...
Zhizhi Zhang, Yuanming Lai, Qian Liu, Xiongzhang Liu, Chongsheng …

All-Angle Scanning Leaky-Wave Antennas and Surface-Wave Routing by Reconfigurable Metasurfaces
Yongming Li, Xikui Ma, Viktar Asadchy, Sergei A. Tretyakov
https://arxiv.org/abs/2506.14954

All-Angle Scanning Leaky-Wave Antennas and Surface-Wave Routing by Reconfigurable Metasurfaces
In this work, we show that propagating waves can be fully converted into surface waves and back using geometrically periodic arrays of simple electrically small metal elements loaded by adjustable reactive loads. The proposed approach allows the creation of all-angle scanning leaky-wave antennas with perfect or even superdirective aperture efficiency at all scan angles. Moreover, it is possible to co-design such leaky-wave antenna arrays with surface-wave waveguides that can guide the received …

Magnetosonic Waves as a Driver of Observed Temperature Fluctuation Patterns in AGN Accretion Disks
Ish Kaul, Omer Blaes, Yan-Fei Jiang, Lizhong Zhang
https://arxiv.org/abs/2506.11189

Magnetosonic Waves as a Driver of Observed Temperature Fluctuation Patterns in AGN Accretion Disks
Recent observations have revealed slow, coherent temperature fluctuations in AGN disks that propagate both inward and outward at velocities of $\sim 0.01 - 0.1c$, a kind of variability that is distinct from reverberation (mediated by the reprocessing of light) between different regions of the disk. We investigate the origin and nature of these fluctuations using global 3D radiation-magnetohydrodynamic simulations of radiation and magnetic pressure-dominated AGN accretion disks. Disks with a sig…

Testing the Quantum Equivalence Principle with Gravitational Waves
Saurya Das, Mitja Fridman, Gaetano Lambiase
https://arxiv.org/abs/2506.14049 https://

Testing the Quantum Equivalence Principle with Gravitational Waves
We study modifications of gravitational wave observables, such as the wave amplitude and frequency, which follow from the quantum equivalence principle, and are expressed in terms of the inertial, gravitational and rest masses of the LIGO/Virgo mirrors. We provide bounds on the violations of the quantum equivalence principle by comparing the results with the most resolved gravitational wave events observed by the LIGO/Virgo collaboration. The formalism is equally applicable to other future grou…

Properties of slow magneto-acoustic waves observed simultaneously using Hi-C 2.1 and AIA
Suraj K. Tripathy, S. Krishna Prasad, D. Banerjee
https://arxiv.org/abs/2506.06126

Properties of slow magneto-acoustic waves observed simultaneously using Hi-C 2.1 and AIA
Propagating slow magneto-acoustic waves are commonly observed in different coronal structures but are most prominent in active region fan loops. Their rapid damping with damping lengths of the order of a wavelength has been investigated in the past by several authors. Although different physical mechanisms have been proposed, significant discrepancies between the theory and observations remain. Recent high-resolution observations captured simultaneously by two different instruments reveal disti…

Composite Hybrid Inflation : Primordial Black Holes and Stochastic Gravitational Waves
Giacomo Cacciapaglia, Dhong Yeon Cheong, Aldo Deandrea, Wanda Isnard, Seong Chan Park, Xinpeng Wang, Ying-li Zhang
https://arxiv.org/abs/2506.06655

Composite Hybrid Inflation : Primordial Black Holes and Stochastic Gravitational Waves
We investigate the production of primordial black holes and gravitational waves in composite hybrid inflation. Starting from an effective chiral Lagrangian with a dilaton and pions, we identify inflation occurring due to the walking dynamics of the theory. A $\mathbb{Z}_2$ symmetry-breaking term in the pion sector induces a shift in the inflaton's trajectory, which leads to a tachyonic instability phase. Curvature perturbations grow exponentially, producing copious primordial black holes and a …

Excitation of whistler and slow-X waves by runaway electrons in a collisional plasma
Qile Zhang, Yanzeng Zhang, Xian-Zhu Tang
https://arxiv.org/abs/2506.09233

Excitation of whistler and slow-X waves by runaway electrons in a collisional plasma
Runaway electrons are known to provide robust ideal or collisionless kinetic drive for plasma wave instabilities in both the whistler and slow-X branches, via the anomalous Doppler-shifted cyclotron resonances. In a cold and dense post-thermal-quench plasma, collisional damping of the plasma waves can be competitive with the collisionless drive. Previous studies have found that for its higher wavelength and frequency, slow-X waves suffer stronger collisional damping than the whist…

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Adrian Ka-Wai Chung, Nicol\'as Yunes
https://arxiv.org/abs/2506.14695

Probing quadratic gravity with black-hole ringdown gravitational waves measured by LIGO-Virgo-KAGRA detectors
Quadratic gravity theories emerge as the low-energy limit of many grand-unified and quantum-gravity theories. We report the first gravitational-wave ringdown constraints on such theories obtained purely from the quasinormal-mode spectra of rapidly-spinning black-hole remnants. We find no quadratic-gravity signatures from ringdown signals measured by the LIGO-Virgo-KAGRA detectors, thereby constraining the coupling length scale of axi-dilaton gravity below 34 km, dynamical Chern-Simons gravity b…

Structured Harmonic Generation via Geometric Phase Enabled Pump Shaping
Ting-Ting Liu, Shi-Hui Ding, Chun-Yu Li, Hui Liu, Zhi-Han Zhu, Peng Chen, Yan-Qing Lu
https://arxiv.org/abs/2506.17167

Structured Harmonic Generation via Geometric Phase Enabled Pump Shaping
Nonlinear optics is crucial for shaping the spatial structure of shortwave light and its interactions with matter, but achieving this through simple harmonic generation with a single pump is challenging. This study demonstrates nonlinear spin-orbit conversion using spin-dependent pump shaping via geometric phase, allowing the direct creation of desired structured harmonic waves from a Gaussian pump beam. By using the liquid-crystal flat optical elements fabricated with photoalignment, we experi…

Impact of Detector Calibration Accuracy on Black Hole Spectroscopy
Mallika R. Sinha, Ling Sun, Sizheng Ma
https://arxiv.org/abs/2506.15979 https://

Impact of Detector Calibration Accuracy on Black Hole Spectroscopy
Systematic errors in detector calibration can bias signal analyses and potentially lead to incorrect interpretations suggesting violations of general relativity. In this study, we investigate how calibration systematics affect black hole (BH) spectroscopy, a technique that uses the quasinormal modes (QNMs) emitted during the ringdown phase of gravitational waves (GWs) to study remnant BHs formed in compact binary coalescences. We simulate a series of physically motivated, tunable calibration er…

The topology, geometry, and angular momentum of cold plasma waves
Eric Palmerduca, Hong Qin
https://arxiv.org/abs/2506.01142 https://…

The topology, geometry, and angular momentum of cold plasma waves
It was recently discovered that plasma waves possess topologically protected edge modes, indicating the existence of topologically nontrivial structures in the governing equations. Here we give a rigorous study of the underlying topological vector bundle structure of cold unmagnetized plasma waves and show that this topology can be used to uncover a number of new results about these waves. The topological properties of the electromagnetic waves mirror those recently found for photons and other …

Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
Karam Bahari, Soma Heydari, Kayoomars Karami
https://arxiv.org/abs/2506.12392

Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
Here, a natural non-canonical inflationary model based on a power-law Lagrangian is investigated. We analyze the scalar spectral index $n_{\rm s}$ and the tensor-to-scalar ratio $r$ of the model and identify their degeneracies with respect to the free parameters. Notably, $n_{\rm s}$ and $r$ are independent of the model parameters that leads to unresolved degeneracies. Employing the constraints on reheating parameters such as the reheating duration $N_{\rm{reh}}$, the reheating temperature $T_{…

QuGrav: Bringing gravitational waves to light with Qumodes
Dmitri E. Kharzeev, Azadeh Maleknejad, Saba Shalamberidze
https://arxiv.org/abs/2506.09459 https…

QuGrav: Bringing gravitational waves to light with Qumodes
We propose using qumodes, quantum bosonic modes, for detecting high-frequency gravitational waves via the inverse Gertsenshtein effect, where a gravitational wave resonantly converts into a single photon in a magnetized cavity. For an occupation number $n$ of the photon field in a qumode, the conversion probability is enhanced by a factor of $n+1$ due to Bose-Einstein statistics. Unlocking this increased sensitivity entails the ability to continuously prepare the qumode and perform non-demoliti…

Cylindrical gravitational impulse wave
Jean Jules Defo, Victor Kamgang Kuetche
https://arxiv.org/abs/2506.10053 https://arxiv.org/pdf…

Cylindrical gravitational impulse wave
The description of gravitational waves as explosion and implosion waves as predicted by Weber and Wheeler [{\it Rev. Mod. Phys. {\bf 29} 509 (1957)}] in Einstein and Rosen spacetime, has recently been confirmed following observations by the LIGO-VIRGO scientific team [{\it Phys. Rev. Lett. {\bf 116 } 061102 (2016)}] resulting from the collision of two massive black holes. In this dynamics, we explore a new possibility in the construction of gravitational waves like explosion and implosion waves…

Superradiant amplification by rotating viscous compact objects
Jaime Redondo-Yuste, Vitor Cardoso
https://arxiv.org/abs/2506.13850 https://

Superradiant amplification by rotating viscous compact objects
We study fluctuations of rotating viscous stars, using the causal relativistic hydrodynamics of Bemfica, Disconzi, Kovtun, and Noronha. We derive, in a slow-rotation approximation, a coupled system of equations describing the propagation of axial gravitational waves through the star, which couple to internal viscous modes. We show that rotating viscous stars amplify incoming low-frequency gravitational waves, a phenomenon which we argue to be universal. Superradiant amplification does not seem …

Non-Hermitian Gravitational Wave Scattering
Burak Pekduran, Mustafa Sar{\i}saman, Ekrem Ayd{\i}ner
https://arxiv.org/abs/2506.08567 https://

Non-Hermitian Gravitational Wave Scattering
In this study, the non-Hermitian scattering of gravitational waves is examined, and their behavior at spectral singularities is discussed. We investigate the non-Hermitian properties of gravitational waves through the construction of a transfer matrix. By examining spectral singularity points obtained from the transfer matrix, we explore the behavior of gravitational waves at these spectral singularity points and compare the theoretical results with observed measurements. Our findings demonstra…