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Keyword：neutrino laser
Study Says Neutrino Laser Physically Impossible Due to Mechanism Constraints
On September 2, physicists at the Massachusetts Institute of Technology published two papers in Physical Review Letters analyzing a previously proposed neutrino laser concept. The research concludes that, due to atomic recoil effects and the fermionic nature of neutrinos, the scheme of using radioactive atomic clouds to produce laser-like neutrino beams is physically impractical. Neutrinos are elementary particles with extremely small mass and very weak interactions with ordinary matter. Earlier research had envisioned cooling radioactive atomic clouds to nanokelvin temperatures to form a Bose-Einstein condensate. According to this concept, atoms in a quantum coherent state might decay synchronously, producing neutrino beams with strong directionality through a quantum amplification effect similar to superradiance...
2026-09-03
Ketterle Team: "Neutrino Laser" Based on Quantum-Entangled Atomic Clouds Theoretically Infeasible
Nobel laureate Wolfgang Ketterle and his team have conducted a theoretical examination of a neutrino laser concept and concluded that the scheme is fundamentally difficult to realize. The research findings have been published in *Physical Review Letters*. The concept was previously proposed by American physicists, with the core idea being the use of rubidium-87 atomic clouds or other unstable isotopes, placing them into specific quantum states to generate highly directional neutrino beams. According to the concept, if a neutrino source analogous to a laser could be constructed, it would help accelerate neutrino mass measurements and advance observational studies of the interconversion phenomena among different types of neutrinos. The Ketterle team's key focus this time was whether a large number of atoms could cooperatively emit neutrinos and other fermions, similar to the synchronized release of photons in a conventional laser.
2026-08-25