NextFin news, Physicists at the Massachusetts Institute of Technology (MIT) and the University of Texas at Arlington proposed on Tuesday a novel concept for a "neutrino laser" that could produce intense, coherent beams of neutrinos by laser-cooling a gas of radioactive atoms to form a Bose-Einstein condensate (BEC). This idea was detailed in a paper published the same day in the journal Physical Review Letters.
The researchers, including MIT Professor Joseph Formaggio and Dr. Ben Jones from the University of Texas at Arlington, suggest that by cooling radioactive rubidium-83 atoms to temperatures colder than interstellar space, the atoms would behave as a single quantum entity and undergo synchronized radioactive decay. This synchronized decay would accelerate neutrino emission, producing a laser-like burst of neutrinos at a much faster rate than normal.
Normally, rubidium-83 has a half-life of about 82 days, meaning half of the atoms decay and emit neutrinos over that period. The physicists calculated that in the coherent BEC state, the atoms could decay within minutes, releasing an amplified neutrino beam. "In our concept for a neutrino laser, the neutrinos would be emitted at a much faster rate than they normally would, sort of like a laser emits photons very fast," said Dr. Jones, an associate professor of physics.
Professor Formaggio described the approach as "a novel way to accelerate radioactive decay and the production of neutrinos, which to my knowledge, has never been done." The team plans to test the concept with a small tabletop experiment by vaporizing radioactive material, trapping it with lasers, cooling it, and forming a Bose-Einstein condensate to observe the predicted superradiance effect.
The neutrino laser concept leverages the quantum optics phenomenon of superradiance, where atoms emit radiation collectively in a coherent burst. While neutrinos are fermions and cannot occupy the same quantum state, the radioactive atoms themselves, when in a BEC, become indistinguishable and can emit neutrinos cooperatively, overcoming this limitation.
If experimentally realized, the neutrino laser could have applications in communication by sending neutrino beams directly through the Earth to underground stations and habitats. Additionally, it could serve as an efficient source of radioisotopes used in medical imaging and cancer diagnostics, as these are byproducts of radioactive decay alongside neutrinos.
The physicists acknowledge challenges ahead, including maintaining the condensate coherence despite radioactive decay and nuclear recoil effects. However, they emphasize that the experiment is feasible with current cold-atom technology and could open new avenues in neutrino detection and quantum physics research.
The research was conducted at MIT in Cambridge, Massachusetts, and the University of Texas at Arlington, and the findings were published on Tuesday, September 9, 2025.
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