Search for dissertations about: "Rare-earth-ion-doped crystals"
Showing result 1 - 5 of 13 swedish dissertations containing the words Rare-earth-ion-doped crystals.
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1. Coherent Processes in Rare-Earth-Ion-Doped Solids
Abstract : This thesis describes a number of coherent processes, such as quantum information processing, superradiance and electromagnetically induced transparency, which have been experimentally implemented using rare-earth-ion-doped crystals. The rare-earths are a class of elements that have in common, an atomic structure that allows for very long lifetimes as well as coherence times, both on optical transitions and on spin transitions. READ MORE
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2. Towards Efficient Quantum Memories in Rare-Earth-Ion-Doped Solids
Abstract : This thesis describes experiments aimed at developing a key component in applications such as quantum networks and long-distance quantum communication systems: quantum memories. Quantum memories for light using photon-echo and coherent rephrasing techniques have been developed. The work is carried out on rare-earth-ion-doped inorganic crystals. READ MORE
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3. Light-Matter Interaction and Quantum Computing in Rare-Earth-Ion-Doped Crystals
Abstract : In this thesis, crystals of yttrium orthosilicate (Y2SiO5) that are randomly doped with another rare-earth element, such as praseodymium (Pr), europium (Eu), or cerium (Ce), are investigated with lasers locked to ultra-stable cavities using the Pound-Drever-Hall locking technique. Many of these rare-earth elements have long-lived 4f-4f transitions, hundreds of microseconds to a few milliseconds, with even longer ground hyperfine lifetimes of up to several days. READ MORE
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4. Quantum memory development and new slow light applications in rare-earth-ion-doped crystals
Abstract : When doped into solid state transparent crystals, rare-earth ions can have optically excited states with milliseconds coherence time and up to six hours coherence time for hyperfine levels after being cooled down to liquid helium temperature. This long coherence property makes them unique as solid state material and attractive for quantum information applications. READ MORE
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5. Coherent Interactions in Rare-Earth-Ion-Doped Crystals for Applications in Quantum Information Science
Abstract : This thesis describes investigations of the use of cryogenically cooled rare-earth-ion-doped crystals for quantum information processing and quantum optics. Several aspects of the coherent interaction between light and rare-earth ions in solids are addressed. Quantum information science has given physicists new views of quantum mechanics. READ MORE
