physics

A physicist set an AI system a notoriously difficult nine-loop problem from theoretical physics, and Claude managed to solve it. The result is drawing attention to how far large language models have come in handling complex, technical calculations once thought to be beyond their reach, and is sparking debate among researchers about AI's growing role in scientific work.

Researchers have used a quantum computer to simulate particles of matter effectively appearing out of nothing, modelling a phenomenon where virtual particles become real in rapidly changing fields. The demonstration offers a new way to study extreme quantum physics that was previously out of reach of experiments, though detailed findings have not yet been widely reported.

A Quanta Magazine article explaining the holographic principle in physics is being discussed on Hacker News. The idea is that gravity in a volume of space can be described by information encoded on that volume's boundary, as in the AdS/CFT correspondence, suggesting three-dimensional reality may emerge from lower-dimensional information. Commenters on the post are debating what this implies about the fundamental nature of space, time and whether reality is a projection.

A new study suggests a widely used dietary supplement can increase muscle strength even in people who do not exercise, according to a report by ScienceAlert. The finding is drawing attention because it challenges the usual assumption that strength gains require physical training, though details of which supplement, how the study was run, and how large the effect is have not been spelled out.

Researchers have reported a key early-universe measurement determined with record-breaking precision. The result refines scientists' understanding of conditions shortly after the Big Bang, though details of which quantity was measured and by which team were not provided. Such precision advances are closely watched in physics because they can confirm the standard cosmological model or expose gaps where new physics might be hiding.

Brazil's CNPEM research centre is collaborating with CERN on superconducting magnet technology for a proposed 91km particle collider. The partnership would connect Brazilian scientists to the world's leading high-energy physics laboratory as CERN develops advanced magnets for a future circular collider larger than the LHC. Details of funding and scope remain limited, but the announcement signals growing international participation in next-generation collider research.

A project called Roboharm is asking whether frontier robot policies, the AI models now being wired into embodied machines, actually refuse unsafe instructions. It examines how large models behave when given harmful physical commands, a question that matters as robots move into homes and workplaces. The work is drawing attention among AI safety and robotics researchers discussing whether current safeguards transfer to the physical world.

Quanta Magazine reports that although biology itself may not rely on quantum effects, the mathematics used to describe biological systems closely resembles quantum formalism. Researchers are applying quantum-like mathematical frameworks to model biological processes, suggesting deep structural parallels between the two fields even where physical quantum effects are absent.

Researchers studying a Siberian lake report new insights into how microbial communities rebuild after the lake underwent a rare full overturn, an event in which the entire water column mixes and disrupts layered habitats. The findings shed light on ecosystem resilience in extreme environments and how microscopic life re-establishes itself after major physical disturbance.

Chinese companies are pushing exoskeleton robots beyond industrial and medical use into the consumer mainstream, according to Nikkei Asia. The wearable robotic devices, which assist movement and reduce physical strain, are being marketed to everyday buyers as prices fall and designs improve, positioning China as a leading player in the emerging consumer robotics sector.

Claude has reportedly computed a nine-loop scattering amplitude in physics, surpassing a long-standing record associated with Lance Dixon. The result concerns perturbative quantum field theory, where multi-loop amplitude calculations are notoriously difficult. Physicists are discussing whether an AI system genuinely produced a correct result at this complexity level, or whether the claim requires independent verification before it can be accepted by the community.