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JWST spots lensing arcs in a distant cluster, hinting at early dark-matter concentration
A ScienceDaily summary of Caltech IPAC reports that the James Webb Space Telescope has found strong gravitational lensing, weak lensing, and faint intracluster light in XLSSC 122, a galaxy cluster about 10.4 billion light-years away. The observations suggest an unusually compact mass distribution may be present, but the source treats this as a test of cosmological models, not a settled verdict.
Criticality on Rényi Defects at $(2+1)\mathrm{D}$ O(3) Quantum Critical Points
At a quantum critical point, the universal scaling behavior of R\'enyi entanglement entropy is controlled by the universality class of the codimension-two R\'enyi (or conical) defects in the infrared theory. In this Letter we perform a systematic study of cri…
Testing superpositions of detector trajectories
We propose a realizable experiment to test the response of a particle detector prepared in a superposition of locations interacting with a relativistic quantum field. Using a beam splitter to prepare two superposed branches of a modulated laser probe, these b…
Quantum spectroscopy of optical near fields using low-energy free-electron Rabi oscillations in synthetic energy space
We propose an ultrafast free-electron quantum interferometry, facilitating the detection of local electromagnetic fields and plasmonic polaritons using an isolated ``two-level'' electron. The two-level electron is constructed in a synthetic energy space throu…
Electronic states, spin-orbit coupling, and magnetism induced by ${60}^{∘}$ dislocations in germanium
Defects in semiconductors have recently attracted renewed interest owing to their potential in novel quantum applications. Here we investigate the electronic and magnetic properties induced by 60\ifmmode^\circ\else\textdegree\fi{} dislocations in Ge. Using la…
Finite temperature NLO corrections in relativistic scatterings: Implications for dark matter freeze-in
We study the next-to-leading order (NLO) virtual and thermal corrections to relativistic $2\ensuremath{\rightarrow}2$ scattering processes involving scalar particles in the early Universe thermal plasma. Taking the example of freeze-in production of scalar da…
Black hole–boson star binaries: Gravitational wave signals and tidal disruption
We present a detailed, fully nonlinear study of binary systems involving one black hole and one boson star, considering the effects of both a quartic self-interaction and a solitonic potential for the scalar field. First, we show the importance of using initi…
Transduction-enabled superconducting quantum repeater: Toward deterministic entanglement distribution with high-fidelity gates
Long-distance entanglement distribution is hindered by photon loss in optical fibers and the no-cloning theorem. Optical quantum repeater (QR) protocols rely on Bell-state measurements (BSMs); they are intrinsically limited to probabilistic photon operations …
Conformal prediction for uncertainties in the neutron star equation of state
We study uncertainties in the equation of state of neutron stars using conformal prediction as a distribution-free and model-agnostic method that provides coverage guarantees. In particular, we apply the Conformalized Quantile Regression (CQR) method to poste…
Observing micro-black-hole dark matter
Primordial micro black holes can constitute dark matter if short-distance gravity is modified by extra dimensions or a large number of species and if the memory-burden effect sufficiently suppresses Hawking evaporation. The resulting black holes in the transi…
Distorting Kerr images with parity-odd scalar hair
We investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to Einstein gravity. The scalar energy density is concentrated in two reflection-…
Constraints on ultralight axions from the DESI DR1 full shape, $Planck$, and ACT datasets
We present updated bounds on ultralight axions (ULAs) as a subcomponent of dark matter, derived from the full-shape analysis of the Dark Energy Spectroscopic Instrument (DESI) Data Release 1 galaxy power spectra combined with cosmic microwave background (CMB)…
Obstructions to traversable wormholes in Einstein-Dirac theory
Traversable wormholes are among the most striking hypothetical solutions of general relativity, but, under standard global assumptions, they require matter that violates the averaged null energy condition (ANEC). A possible candidate for such matter is the Di…
Fermi scale from quantum gravity scaling solution
We propose that quantum gravity may predict the Fermi scale. Fundamental scale invariance implies the scale invariant standard model. Both the Fermi scale and the Planck mass are given by fields, and their ratio is dictated by a dimensionless cosmon-Higgs cou…
$\mathit{Abinitio}$ search for the precise location of an Fe atom in a $1{T}^{′}{\text{-WTe}}_{2}$ monolayer
In this study, using density functional theory, we investigate the structural, electronic, and magnetic properties of Fe adatom, interstitial, and substitutional configurations in monolayer ${1T}^{\ensuremath{'}}{\text{-WTe}}_{2}$. We find that under Te-poor …
Nuclear Polarization by Intense Laser Pulses
Nuclear polarization plays an essential role in precision measurements, symmetry tests, and emerging quantum technologies, yet efficient polarization of heavy nuclei remains a major challenge. We propose an efficient, intense-laser-based approach that achieve…
Production of global vortices with quantum mediation
We study global vortex production in (numerical) scattering experiments when the scatterer and the vortex degrees of freedom interact only due to intermediary quantum variables. We work in $2+1$ dimensions with a complex scalar field, $\ensuremath{\phi}$, tha…
Past and future isotropization in $f(R)$ dark energy models
We present a dynamical system analysis for the homogeneous and anisotropic Bianchi I cosmology in the context of Hu-Sawicki $f(R)$ gravity with parameters ${n,{C}_{1}}={1,1}$. Deriving the corresponding four-dimensional dynamical system from the field equatio…
Hidden integer quantum ferroelectricity in chiral tellurium
Ferroelectricity is a cornerstone of functional materials research, enabling diverse technologies from nonvolatile memory to optoelectronics. Recently, type-I integer quantum ferroelectricity (IQFE), unconstrained by symmetry, has been proposed and experiment…
Gauss-Bonnet theorem for quantum states: Gauss curvature and topology in the projective Hilbert space
Geometry and topology are fundamental to modern condensed matter physics, but their precise connection in quantum systems remains incompletely understood. Here, we develop an analytical scheme for calculating the curvature of the quantum metric of Bloch bands…
Rearranging Crystals from Within
Author(s): Akashni Raghubar LatchannaJulian Klein and Frances Ross explain how electron microscopes are becoming tools for engineering defects inside crystalline materials.[Physics 19, 131] Published Mon Oct 05, 2026
India successfully demonstrates its first free-space quantum-secure communication link for over 5.5 km
Indian deep-tech startup QNu Labs, in collaboration with Bhaskaracharya National Institute for Space Applications and Geo-informatics (BISAG-N) and IIT Gandhinagar, has successfully demonstrated India’s first free-space quantum key distribution (QKD) link for over 5.56 km.
VanEck Sees Bitcoin Reaching $500,000 As Gold Benchmark Supports Long-Term Upside Case
VanEck's Matthew Sigel said the Bitcoin-to-gold ratio leaves room for Bitcoin to double against the metal. - He said quantum computing is not a reason to sell Bitcoin. - VanEck's medium-term target is half of gold's market capitalization. Bitcoin (BTC) could …
Show HN: AstroHelm – Use your phone camera to aim a telescope or telephoto lens
Hello HN!As an amateur astronomer living in New York City, finding objects in the night sky has always been a huge challenge. I thought about using the smartphone's gyroscope and magnetometer, but the accuracy left a lot to be desired.Then I learned about pla…
A Solution to a Problem of the Millennium Prize Problems
Anonymous A and Anonymous B, twin sisters and aspiring mathematicians from the United States To be clear, we offer no mathematical insight on any of the seven problems themselves. The object we study here is the construction of the Millennium Prize Problems P…
Scientists find a surprising clue to why the universe’s expansion doesn’t add up
Tiny magnetic fields created shortly after the Big Bang may help explain the long-running disagreement over how fast the universe is expanding. Detailed simulations show that these primordial fields could have changed the formation of hydrogen in the early universe, affecting the cosmic microwave background and the expansion rate inferred from it.
Maverick Quantum: A 14-Foot Pine-Lined Tiny House with a Covered Porch
Maverick's 14-foot Quantum wraps a sleeping loft, butcher-block kitchen, and full bath in natural pine, with a covered front porch and standing-seam metal roof. Built in New Paris, Ohio.
China’s Shenzhou-23 crew conducts science and health checks
The three astronauts carried out microgravity experiments, station maintenance and medical examinations aboard the Tiangong space station.
Show HN: Nightwatch – a Mac menu-bar app that tells you when tonight is clear
Silent macOS menu-bar app that tells you when tonight is clear enough for telescope imaging and what to point at. Any telescope. MIT. - rsutcliffe/nightwatch
Better Quantum Computing Stock: Alphabet vs. IonQ
Quantum computing has a huge market opportunity that's quickly approaching. Many in the industry now project 2029 as the year viable quantum computing technology arrives, which isn't all that far away. Companies of all sizes are vying for viable quantum compu…
Merz, defense CEOs arrive in Kyiv
German Chancellor Friedrich Merz arrived in Kyiv on Sunday morning, accompanied by chief executives of major German defense companies, including Siemens Energy, Hensoldt, Diehl Defence, Quantum System...
Why do birds not like rain?
Why Birds Generally Dislike Rain: A Bird’s-Eye View Why do birds not like rain? The short answer is: rain can significantly compromise a bird’s flight capabilities, increase their energy expenditure, and create hypothermic conditions, making them vulnerable to predators and starvation. While not all birds actively dislike rain, they have evolved behavioral and physiological adaptations ... Read more
‘Abhijit Dipke can’t run away from this’: CJP in soup after 75-year-old dies at Mumbai protest; Dadar residents demand action
Residents of Shivaji Park are demanding accountability from the Cockroach Janta Party following a protest incident. A 75-year-old man suffered a heart attack during the gathering, which raised concerns among locals. Residents had previously warned authorities…
María Branyas Morera lived to 117; when scientists studied her body they found…
Scientists investigated María Branyas Morera, the world's oldest verified living person, after her 117th birthday. They collected various biological samples, revealing a mixture of extreme old age signs and youthful features. Despite her short telomeres, she …
María Branyas Morera lived to 117; when scientists studied her body after she died, her cells surprised them: Her biological age was…
Scientists investigated María Branyas Morera, the world's oldest verified living person, after her 117th birthday. They collected various biological samples, revealing a mixture of extreme old age signs and youthful features. Despite her short telomeres, she …
Scattering, Hawking radiation, and neutrino energy deposition in Euler-Heisenberg black holes surrounded by perfect fluid dark matter
We study the dynamical and scattering properties for the Euler-Heisenberg black holes surrounded by perfect fluid dark matter. The geometry contains a compact nonlinear electrodynamic correction governed by the Euler-Heisenberg coupling and a logarithmic dark…
Possible high-energy neutrino emission from dark matter annihilation in the disrupting dwarf galaxy Boötes III
We report the first search for high-energy neutrino emissions from dark matter (DM) annihilation in stellar-stream cores. Motivated by a recent gamma-ray study that proposed these cores as a new class of indirect DM targets, we analyze three stream cores in t…
Simulating Particle Creation with Cold Atoms
Author(s): Michael SchirberResearchers observe atoms trapped in an optical lattice mimicking particles created in a strong electric field.[Physics 19, s131] Published Thu Oct 01, 2026
Probing False Vacuum Decay on a Cold-Atom Gauge-Theory Quantum Simulator
Author(s): Zi-Hang Zhu, Ying Liu, Gianluca Lagnese, Federica Maria Surace, Wei-Yong Zhang, Ming-Gen He, Jad C. Halimeh, Marcello Dalmonte, Siddhardh C. Morampudi, Frank Wilczek, Zhen-Sheng Yuan, and Jian-Wei PanResearchers observe atoms trapped in an optical …
Unconventional Superconductivity from Lattice Quantum Disorder
Unconventional superconductivity presents a defining challenge in physics. Prevailing theoretical frameworks have predominantly emphasized electrons, largely neglecting the rich physics inherent in the lattice. Conventional phonon theory omits quantum many-bo…
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