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Rare-earth quantum memories for single photons and entanglement

Defense Thèse de doctorat : Univ. Genève, 2013 - Sc. 4544 - 2013/03/27
Abstract The ability of storing and retrieving quantum states of light is an important experimental challenge in quantum information science. A powerful quantum memory for light is required in a quantum repeater, which would allow long distance (>500km) quantum communications. To be implemented in such application, the quantum memory must allow on-demand readout, with high fidelity and efficiency, and a long storage time. Additionally a multimode capacity (for temporal or spatial modes) would allow multiplexing. Our approaches focus on rare-earth doped crystals, i.e. solid state quantum memory. I present, in this work, our contributions for a solid-state quantum storage, with good performances in every criteria. In particular, I present the preservation of quantum entanglement during the storage, which paves the way for the implementation of quantum memories in quantum repeaters.
Keywords Quantum memoriesquantum repeatersquantum informationrare-earth doped crystalsspectroscopyatomic frequency combquantum communicationquantum entanglementquantum opticatomic ensembleslight matter coupling
URN: urn:nbn:ch:unige-276020
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USMANI, Imam. Rare-earth quantum memories for single photons and entanglement. Université de Genève. Thèse, 2013. https://archive-ouverte.unige.ch/unige:27602

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Deposited on : 2013-04-29

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