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Light Stored and Transported in a Cloud of Atoms

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JOEL WILLIAMS, ASSOCIATE EDITOR
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MAINZ, Germany, Oct. 21, 2020 — Researchers at Johannes Gutenberg University Mainz (JGU) successfully transported light stored in a quantum memory over a distance of 1.2 mm. The technology, once refined, could have implications for quantum memory storage. To achieve high-level storage efficiency and to extend the lifetime of the stored light, the researchers used ultracold rubidium-87 atoms as a storage medium. The light is stored via an electronically induced transparency process, in which the electric field of the incoming light is coherently transformed into an excitation of the storage medium, which, in this case,...Read full article

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    Published: October 2020
    Glossary
    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...
    lattice
    In photonics, a lattice refers to a periodic arrangement of optical elements or structures, often on a microscopic or nanoscopic scale. These optical lattices can be created using various techniques such as lithography, etching, or deposition processes. The arrangement of these elements forms a regular grid-like pattern, analogous to the crystal lattice in solid-state physics. One common application of optical lattices is in photonic crystals, which are engineered materials with periodic...
    Research & TechnologyEuropequantumquantum computinglight storagelatticequantum memoryelectronically induced transparencyEITLasersoptical conveyor beltrubidiumrubidium atomrubidium atomsoptical storage

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