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arXiv:1704.02221

Multiqubit Greenberger-Horne-Zeilinger state generated by synthetic magnetic field in circuit QED

Wei Feng, Da‐Wei Wang, Han Cai, Shi-Yao Zhu

Published Apr 7, 2017• 0 citations
arXivHTMLPDF

Abstract

We propose a scheme to generate Greenberger-Horne-Zeilinger (GHZ) state for N superconducting qubits in a circuit QED system. By sinusoidally modulating the qubit-qubit coupling, a synthetic magnetic field has been made which broken the time-reversal symmetry of the system. Directional rotation of qubit excitation can be realized in a three-qubit loop under the artificial magnetic field. Based on the special quality that the rotation of qubit excitation has different direction for single- and double-excitation loops, we can generate three-qubit GHZ state and extend this preparation method to arbitrary multiqubit GHZ state. Our analysis also shows that the scheme is robust to various operation errors and environmental noise.

DOI
10.48550/arxiv.1704.02221

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