Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 31: Quanteninformation: Konzepte und Methoden 4

Q 31.8: Talk

Tuesday, March 13, 2012, 15:45–16:00, V7.01

Optimal teleportation with a noisy source — •Bruno G. Taketani^1,3, Fernando de Melo^2,3, and Ruynet L. de Matos Filho¹ — ¹Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil — ²Instituut voor Theoretische Fysica, Katholieke Universiteit Leuven, Leuven, Belgie — ³Physikalisches Institut der Albert-Ludwigs-Universität, Freiburg, Deutschland

In this work we discuss the role of decoherence in quantum information protocols. Particularly, we study quantum teleportation in the realistic situation where not only the transmission channel is imperfect, but also the preparation of the state to be teleported. The optimal protocol to be applied in this situation is found and we show that taking into account the input state noise leads to sizable gains in teleportation fidelity. It is then evident that sources of noise in the input state preparation must be taken into consideration in order to maximize the teleportation fidelity. The optimization of the protocol can be defined for specific experimental realizations and accessible operations, giving a trade-off between protocol quality and experiment complexity.