Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System

Hanhee Paik, A. Mezzacapo, Martin Sandberg, D. T. McClure, B. Abdo, A. D. Córcoles, O. Dial, D. F. Bogorin, Britton Plourde, M. Steffen, A. W. Cross, J. M. Gambetta, Jerry M. Chow

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

The resonator-induced phase (RIP) gate is an all-microwave multiqubit entangling gate that allows a high degree of flexibility in qubit frequencies, making it attractive for quantum operations in large-scale architectures. We experimentally realize the RIP gate with four superconducting qubits in a three-dimensional circuit-QED architecture, demonstrating high-fidelity controlled-z (cz) gates between all possible pairs of qubits from two different 4-qubit devices in pair subspaces. These qubits are arranged within a wide range of frequency detunings, up to as large as 1.8 GHz. We further show a dynamical multiqubit refocusing scheme in order to isolate out 2-qubit interactions, and combine them to generate a 4-qubit Greenberger-Horne-Zeilinger state.

Original languageEnglish (US)
Article number250502
JournalPhysical Review Letters
Volume117
Issue number25
DOIs
StatePublished - Dec 13 2016

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Paik, H., Mezzacapo, A., Sandberg, M., McClure, D. T., Abdo, B., Córcoles, A. D., Dial, O., Bogorin, D. F., Plourde, B., Steffen, M., Cross, A. W., Gambetta, J. M., & Chow, J. M. (2016). Experimental Demonstration of a Resonator-Induced Phase Gate in a Multiqubit Circuit-QED System. Physical Review Letters, 117(25), [250502]. https://doi.org/10.1103/PhysRevLett.117.250502