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Café com Física |
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08 de maio de 2013
16h30 Sala F-210 Eduardo Novais de Sá Centro de Ciências Naturais e Humanas - UFABC Surface code threshold in the presence of correlated errors (.pdf) We
study the fidelity of the surface code in the presence of correlated
errors induced by the coupling of physical qubits to a bosonic
environment. By mapping the time evolution of the system after one
quantum error correction cycle onto a statistical spin model, we show
that the existence of an error threshold is related to the appearance
of an order-disorder phase transition in the statistical model in the
thermodynamic limit. This allows us to relate the error threshold to
bath parametersand to the spatial range of the correlated errors. 
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