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Laser Cools Antimatter to Near Absolute Zero

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JOEL WILLIAMS, ASSOCIATE EDITOR
[email protected]

A custom-built laser has cooled antimatter to near absolute zero. The work, carried out by researchers with the CERN-based ALPHA collaboration, holds significant implications for the study of antimatter and its properties, and of foundational theories of the universe. Antimatter is nearly identical to matter in terms of its behavior and characteristics, but it possesses the opposite charge. When matter and antimatter come into contact, they annihilate one another. Experimentation remains difficult for this reason. The movement of an antihydrogen atom in the ALPHA magnetic trap,...Read full article

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    Published: April 2021
    Glossary
    laser cooling
    Laser cooling is a technique used to reduce the temperature of a material or a collection of atoms or molecules by using laser light. It is based on the principle of selective absorption and emission of photons by atoms or molecules. In laser cooling, specially tuned laser beams are directed at the material or atoms. When these atoms absorb photons from the laser light, they gain momentum in the direction of the laser beam due to the momentum carried by the photons. However, according to...
    quantum
    The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the atomic and subatomic scales. It originates from quantum theory, a branch of physics that emerged in the early 20th century to explain phenomena observed on very small scales, where classical physics fails to provide accurate explanations. In the context of quantum theory, several key concepts are associated with the term quantum: Quantum mechanics: This is the branch of...
    Research & TechnologyLasersantimatteranti-hydrogenantihydrogenantihydrogen atomslaser coolingabsolute zeroTRIUMFNaturequantumphysicsAmericasCanadaUniversity of British Columbiaspectroscopydye laserslaser systemsTech Pulse

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