Error correction in short time steps during the application of quantum gates

Autor(es)

de Castro, L. A. ^[1] ; Napolitano, R. D. J. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Inst Phys, POB 369, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ANNALS OF PHYSICS; v. 367, p. 199-211, APR 2016.
• Citações Web of Science: 0

Resumo

We propose a modification of the standard quantum error correction method to enable the correction of errors that occur due to the interaction with a noisy environment during quantum gates without modifying the codification used for memory qubits. Using a perturbation treatment of the noise that allows us to separate it from the ideal evolution of the quantum gate, we demonstrate that in certain cases it is necessary to divide the logical operation in short time steps intercalated by correction procedures. A prescription of how these gates can be constructed is provided, as well as a proof that, even for the cases when the division of the quantum gate in short time steps is not necessary, this method may be advantageous for reducing the total duration of the computation. (C) 2016 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 09/12460-0 - Teoria de correção de erros quânticos durante operações lógicas e medidas de diagnóstico de duração finita
• Beneficiário: Leonardo Andreta de Castro
• Modalidade de apoio: Bolsas no Brasil - Mestrado