Analyzing the Toffoli gate in disordered circuit QED

We study the effects of imperfections on the fidelity of the Toffoli gate recently realized in a circuit~QED setup using quantum control methods. The noise is introduced in the interqubits interactions. The coupling constants are no longer fixed; instead, they fluctuate around average values obeying...

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Bibliographic Details
Published in:arXiv.org 2016-08
Main Authors: J Khatibi Moqadam, Portugal, Renato, Svaiter, N F, Corrêa, G O
Format: Article
Language:English
Subjects:
Constants
Control methods
Coupling
Defects
Noise control
Optimization
Probability density functions
Quantum electrodynamics
Online Access:Get full text
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Summary:We study the effects of imperfections on the fidelity of the Toffoli gate recently realized in a circuit~QED setup using quantum control methods. The noise is introduced in the interqubits interactions. The coupling constants are no longer fixed; instead, they fluctuate around average values obeying some given probability density functions characterizing the dynamical-imperfection case. We also consider the static-imperfection case in which the values of the coupling constants are not exactly known. We obtain a more robust gate by modifying the quantum optimization problem using a weighted average of the fidelity over an interval of coupling values as the objective functional.
ISSN:2331-8422
DOI:10.48550/arxiv.1302.6565