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Using sideband transitions for two-qubit operations in superconducting circuits

P. J. Leek, S. Filipp, P. Maurer, M. Baur, R. Bianchetti, J. M. Fink, M. Göppl, L. Steffen, and A. Wallraff
Phys. Rev. B 79, 180511(R) – Published 29 May 2009

Abstract

We demonstrate the time-resolved driving of two-photon blue sideband transitions between superconducting qubits and a transmission line resonator. As an example of using these sideband transitions for a two-qubit operation, we implement a pulse sequence that first entangles one qubit with the resonator and subsequently distributes the entanglement between two qubits. We show the generation of 75% fidelity Bell states by this method. The full density matrix of the two-qubit system is extracted using joint measurement and quantum state tomography and shows close agreement with numerical simulation.

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  • Received 16 December 2008

DOI:https://doi.org/10.1103/PhysRevB.79.180511

©2009 American Physical Society

Authors & Affiliations

P. J. Leek*, S. Filipp, P. Maurer, M. Baur, R. Bianchetti, J. M. Fink, M. Göppl, L. Steffen, and A. Wallraff

  • Department of Physics, ETH Zurich, CH-8093 Zurich, Switzerland

  • *leek@phys.ethz.ch

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Issue

Vol. 79, Iss. 18 — 1 May 2009

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