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Impossible Neutrino Detected: Scientists Link 2023 Cosmic Shock to Exploding Primordial Black Holes A baffling cosmic event in 2023 saw a neutrino slam into Earth with an energy level that defied all known physics . The particle was vastly more powerful than anything humanity has ever generated, dwarfing even the Large Hadron Collider's capabilities by a factor of 100,000 . Researchers at the University of Massachusetts Amherst now believe such an event could occur when a rare, early-universe black hole — described as quasi-extremal , undergoes a catastrophic explosion . Their findings, reported in Physical Review Letters , not only solve the mystery of the impossible neutrino but also position it as a potential key to understanding the universe at its most fundamental level . From Stellar Collapse to the Early Universe Black holes are no longer the stuff of speculation and scientists have a solid grasp of how they form. When a massive ageing star exhausts its nuclear fuel, ...

Quantum Chaos Simulation on 91-Qubit Processor Using Error Mitigation Breakthrough Large-Scale Quantum Chaos Finally Within Reach of Near-Term Quantum Computers The study of quantum chaos aims to translate chaotic classical dynamics into quantum terms, but practical simulations have been held back by limited computing power. Using advanced error mitigation and custom-designed circuits on a 91-qubit superconducting quantum processor , researchers have demonstrated a promising new approach. The work is reported in Nature Physics . Error Mitigation Instead of Error Correction Reliable quantum simulations demand the suppression of errors, yet full-scale quantum error correction comes at the cost of significant qubit and control overheads . Until now, researchers have largely sidestepped this challenge by focusing on smaller quantum many-body systems or on integrable models that exhibit limited chaos. In the new study, the team adopted a different strategy. Rather than eliminating noi...

Breakthrough Quantum Photon Source Delivers On-Demand Identical Light in Telecom Band Record-Quality Single Photon Mark Major Step Toward Scalable Quantum Computing A research team from the University of Stuttgart and Julius-Maximilians-Universit ä t W ü rzburg, led by Professor Stefanie Barz of the University of Stuttgart, has unveiled a new single-photon source that delivers both on-demand performance and record-breaking photon quality in the telecommunications C-band. The breakthrough marks a significant advance towards scalable photonic quantum computing and secure quantum communication . "For more than ten years, the absence of a high-quality, on-demand C-band photon source has posed a serious challenge for quantum optics laboratories," Professor Barz says. "Our technology now overcomes this long-standing barrier." The Key: Identical Photons on Demand In everyday life, standing out is often seen as a virtue and few people aspire to be exactly the same as eve...

Clearest Black Hole Signal Ever Puts Einstein's Gravity to the Test For scientists tracking gravitational waves from across the cosmos, GW250114 stands out as a landmark event. It is the clearest gravitational-wave signal ever recorded from a binary black hole merger , offering an exceptional opportunity to put Albert Einstein's theory of gravity — general relativity — to the test. Related space and physics reporting A Signal That Redefines Precision in Gravitational Wave Astronomy "What's remarkable is that this event closely mirrors the very first detection we made in decade ago, GW150914 ," said Cornell physicist Keefe Mitman , a NASA Hubble Postdoctoral Fellow at the Cornell Center for Astrophysics and Planetary Science. "The difference is clarity our detectors are now vastly more precise than they were ten years ago." Mitman is a co-author of the study Black Hole Spectroscopy and Tests of General Relativity with GW250114 , published in Physical...

CERN Scientists Observe Quark Wake in Primordial Plasma, Revealing How the Universe First Flowed Just after the Big Bang , the newborn universe was an intensely hot sea of quarks and gluons , heated to- trillions of degrees . These particles shot around at near light speed , forming a fleeting substance called Quark-Gluon Plasma (QGP) that existed for only millionths of a second . As temperatures fell, the plasma cooled and condensed, giving rise to protons, neutrons and the fundamental matter that makes up the universe today. Related cosmic and physics coverage Recreating the Universe's First Moments at CERN Scientists at CERN's Large Hadron Collider are now recreating this early cosmic state to better understand how the universe began. By colliding heavy ions enormous energies, they can momentarily recreate quark-gluon plasma and study matter as it existed in the universe's first instants . More science and environment research Breakthrough Discovery of Quark Wake Effe...

Scientists Say Star-Powered Megastructures Could Be Stable, Challenging Science Fiction Assumptions Artificial Structures Designed to Extract Energy from Stars Could Remain Stable New scientific modelling suggests that vast artificial structures designed to extract energy from stars are not merely science fiction . A study led by Colin McInnes at the University of Glasgow and published in Monthly Notices of the Royal Astronomical Society, finds that advanced constructs such as stellar engines and Dyson bubbles could remain gravitationally balanced , provided appropriate engineering safeguards are in place, allowing them to draw power directly from their host stars. Related space science coverage: Astronomy, physics and cosmic research Why Astronomers Imagine Mega-Structures Around Stars For decades, scientists have debated whether highly advanced alien civilizations might exist elsewhere in the universe. While these ideas remain speculative, many studies point towards a shared solu...

Artificial Intelligence Solves Decades-Old Puzzle in Quantum Field Theory Simulations A long-standing problem in particle physics has finally been resolved: how best to formulate quantum field theories on a lattice so they can be efficiently simulated on computers. The breakthrough, scientists say, has come from artificial intelligence (AI) . Why Quantum Field Theories Are So Hard to Simulate Quantum field theories underpin modern physics , explaining how particles behave and interact. Yet many of the field's most challenging questions cannot be solved with traditional mathematics alone and instead vast and highly complex computer simulations . The difficulty lies in the fact that quantum field theories can be implemented on computers in many different ways. While these approaches should, in theory, produce the same physical results, their practical performance varies dramatically. Related science and physics reporting Searching for the Optimal Lattice Formulation Some lattice f...