Troca de Emaranhamento e Teletransporte Controlado no contexto de rotações de Faraday fotônicas
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2011-03-04
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Universidade Federal de Goiás
Resumo
Taking advantage of the Faraday rotations that occur in a photonic cristal placed
in an optical cavity with low quality factor, we proposed two schemes to obtain
the swapping of entanglement of atomic states, useful in quantum communication
and quantum computation. They employ three-level atoms in a -configuration, a
linearly polarized photon source, a single detector, and a quarter wave plate. Three
(four) cavities are used in the first (second) scheme. An additional scheme was also
proposed to obtain controlled teleportation of superposition states, partial controlled
teleportation of entangled states and controlled teleportation of entanglement.
In all schemes we have included the imperfections that affect the system, such as
transmission and coupling of photons in optical components, the fraction of photons
with a desired polarization, the quantum efficiency of single photon detection, the
effective solid angle where the photon are collected, and the rate of emitted photons
by the source. Under these realistic conditions we estimate the success probability
of each proccess, including the time spent for its realization.
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Bastos, Wellison Peixoto - Troca de Emaranhamento e Teletransporte Controlado no contexto de rotações de Faraday fotônicas - 2011 - 82 f.- Dissertação - Programa de Pós-graduação em Fisica (IF) - Universidade Federal de Goiás - Goiânia - Goiás - Brasil.