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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…
Sexaquarks and $H$ dibaryons in the $uuddss$ system: A comparison within a constituent quark model
We study the $uuddss$ multiquark within a constituent quark model framework, solving the corresponding nonrelativistic Schr\"odinger equation including the AL1 potential by means of a diffusion Monte Carlo (DMC) method. The total wave function is written as t…
Analytical and machine learning methods for model discernment at $\mathrm{CE}ν\mathrm{NS}$ experiments
Neutrino experiments are currently limited by low statistics, sizable systematic uncertainties, and coarse observable binning, which can hinder discrimination among competing beyond-the-Standard-Model (BSM) explanations of anomalous signals. In particular, an…
Regular black holes from anisotropic source with hydrodynamic equation of state
We study regular black hole solutions sourced by an anisotropic energy momentum tensor. It is well known that the geometry of the interior of a spherically symmetric regular black hole approaches the de Sitter metric. Having decomposed the energy momentum ten…
Reevaluating quantum geometric criteria for itinerant magnetic instabilities
The interplay between quantum geometry and electron correlation has emerged as a compelling paradigm in quantum many-body physics. Recent studies have highlighted the diagnostic utility of quantum geometry in identifying magnetic instabilities within itineran…
Generation of tripartite non-Gaussian entanglement via cascaded three-mode and two-mode spontaneous parametric down-conversion
Multipartite non-Gaussian entanglement constitutes a core resource for continuous-variable quantum networks. Although three-mode spontaneous parametric down-conversion (SPDC), a process capable of deterministically generating non-Gaussian entanglement, has re…
Electronic structure of an artificial two-dimensional polar metal
Polar metals, a category of materials exhibiting the unexpected coexistence of polar structural distortion and metallicity, have attracted considerable research interest. Despite several experimental studies, the effect of polar distortions on the electronic …
The Giant Permittivity of Nanoconfined Water
Author(s): Marric StephensResearchers have proposed that long-range molecular dipole correlations alter water’s electrical properties when it’s confined in a gap a few nanometers wide.[Physics 19, s130] Published Thu Oct 01, 2026
Time delay as a probe of multiple photon spheres
Black hole shadow images are primarily determined by the properties of photon spheres and can exhibit degeneracies across different spherically symmetric spacetime geometries. We show that time delay observables associated with higher-order images of transien…
Measurement of the Gerasimov-Drell-Hearn integrand for the proton and deuteron from 200 to 1400 MeV
Author(s): P. Pedroni et al. (A2 Collaboration at MAMI)The Gerasimov-Drell-Hearn (GDH) sum rule establishes a fundamental link between the total absorption cross section of circularly polarized photons on longitudinally polarized nucleons and nuclei and their…
Exploring pedagogical content knowledge of physics teaching assistants using the Energy and Momentum Conceptual Survey
Author(s): Liam Doyle, Alexandru Maries, and Chandralekha SinghDiscover how physics teaching assistants frequently overestimate the conceptual errors of introductory students and how this impacts classroom instruction.[Phys. Rev. Phys. Educ. Res. 22, 020138] …
Comparing AI chatbot, tiered, and textual support in physics problem solving: Effects on cognitive load and affective-motivational outcomes
Author(s): Eleonore Becker, Johannes Wünsche, Joaquin Veith, Johanna Schrader, and Philipp BitzenbauerA field study of ninth-grade physics students shows that interactive AI chatbots and tiered support significantly reduce perceived cognitive load compared to…
Student interactions and experiences in online team-working activities in astrophysics and space science
Author(s): Mark H. Jones, Sarah M. Chyriwsky, Judith H. Croston, Ulrich C. Kolb, Susanne P. Schwenzer, and Sheona A. UrquhartDistance-learning students in astrophysics and space science report that online team-working activities provide valuable preparation f…
Meet Liam Desre, the 14-year-old Canadian who proposed a thermodynamic alternative to dark energy; his cosmology project won a €5,000 second prize against 144 young researchers from 37 countries at EUCYS 2026
Evaluating a Thermodynamic Extension to Standard Cosmology, won a second prize of €5,000 at the European Union Contest for Young Scientists (EUCYS) 2026 in Kiel, Germany, where 144 young scientists from 37 countries presented their work, according to Youth Science Canada News.
Singapore eyes role in global fusion energy industry
Singapore has built up expertise and a strong talent pipeline in areas relevant to fusion, such as precision engineering, advanced manufacturing and plasma diagnostics, says Energy, Trade and Industry Minister Tan See Leng.
Caltech physicists finally measure a quantum energy ladder predicted 40 years ago
Researchers have experimentally observed energy patterns that physicists have predicted for about 40 years. By arranging laser-trapped atoms into a quantum simulator, they recreated two different quantum tipping points and watched the atoms fall into the exact energy ratios predicted by theory. The technique could now be used to explore mysterious quantum systems where scientists do not already know the answer.
Gravity-induced entanglement under constrained dynamics
Tests of gravity-induced entanglement have been proposed as a route to probing the quantum nature of gravity, but existing schemes rely on free-fall interferometry of massive spatial superpositions, imposing severe experimental constraints. We show that syste…
Observation of Nuclear Suppression in Coherent $\mathrm{ϒ}(1\mathrm{S})$ Photoproduction off Heavy Nuclei at the LHC
The first measurement of coherent $\mathrm{\ensuremath{\Upsilon}}(1\mathrm{S})$ meson photoproduction off heavy nuclei is performed using ultraperipheral lead-lead collisions collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 5.02 T…
Atom-Photon Entanglement with a Single Trapped Cesium Atom
Author(s): H. Hwang, J. Moon, F. Herzallah, E. Oh, A. Safari, and M. SaffmanHigh-fidelity atom–photon entanglement using single cesium atom trapped in an optical tweezer acts as a new interface for heterogeneous quantum networks.[Phys. Rev. Lett. 137, 140801]…
Exact quantum transport in non-Markovian open Gaussian systems
We build an exact framework to evaluate heat, energy, and particle transport between Gaussian reservoirs mediated by a quadratic quantum system. By combining full counting statistics with newly developed non-Markovian master equation approaches, we introduce …
Primordial black holes are five dimensional
We revisit well-established mechanisms for primordial black hole (PBH) production, namely inflation, phase transitions, and cosmic strings, in the context of the dark dimension scenario, which is motivated by swampland principles. Applying quantum gravity con…
Dissipative phase transitions in an open quantum Rabi model with two-photon processes
We demonstrate a mechanism driving complex critical phenomena in open light-atom interacting systems by investigating a parametrically amplified quantum Rabi model (QRM) subject to both single- and two-photon decay. In the classical oscillator limit, four com…
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