Título:
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Gradient echo memory in a tripod-like dense atomic medium
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Autores:
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Carreño Sánchez, Fernando ;
Antón Revilla, Miguel Ángel
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2010-12-01
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/restrictedAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Optica
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Materia = Ciencias Biomédicas: Óptica y optometría: Óptica geométrica e instrumental
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Tipo = Artículo
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Resumen:
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We analyze the storage and retrieval of a weak light pulse, having two orthogonally (circularly) polarized components, onto an atomic ensemble of four-level atoms of the tripod type driven by a far detuned coupling field. The atoms are subject to a longitudinal magnetic field which produces a spatially varying Zeeman splitting of the lower levels along the medium and allows for a spatial encoding of the different angular frequencies of the input pulse during the storage phase. A single reversion of the external magnetic field results in a rephasing of the dipoles and leads to the release of the stored signals. The shape of the recovered pulse is a time-reversal copy of the input pulse. The application of an additional reversion of the magnetic field during the storage phase allows the release of a copy of the input pulse without time reversal. We also show that the system may operate like an all-optical multiplexer when considering two impinging optical fields which have orthogonal components. The proposal has potential applications in quantum information processing.
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En línea:
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https://eprints.ucm.es/47730/1/Carre%C3%B1o_Gradient-OptCom-Elsevier-2010_1-s2.0-S0030401810007601-main.pdf
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