Multi-Resonator Circuit QED Part III: Two-Resonator Entanglement

ORAL

Abstract

Quantum entanglement, a defining feature of quantum mechanics, has been demonstrated in a variety of nonlinear spin-like systems. Quantum entanglement in linear systems has proven significantly more challenging, as the intrinsic energy level degeneracy associated with linearity makes quantum control more difficult. Here we demonstrate the quantum entanglement of photon states in two independent linear microwave resonators utilizing two superconducting phase qubits coupled through a band-pass resonator. After entangling two qubits into a Bell state, we demonstrate the controlled sequential photon amplification and transferring procedures, creating N quanta excitations distributed in two resonators. We completely characterize the two-resonator states with bipartite Wigner tomography and prove the existence of entanglement.

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Authors

  • Haohua Wang

    • University of California, Santa Barbara
    • Physics Department, University of California, Santa Barbara

  • Matteo Mariantoni

    • Walther-Meissner-Institut and TU Muenchen, Garching, Germany
    • Physics Department, University of California, Santa Barbara

  • Radoslaw C. Bialczak

  • M. Lenander

  • Erik Lucero

  • M. Neeley

  • A.D. O'Connell

  • D. Sank

  • M. Weides

  • J. Wenner

  • Y. Yin

  • J. Zhao

  • John Martinis

    • University of California, Santa Barbara
    • UC Santa Barbara
    • University of California at Santa Barbara
    • Physics Department, University of California, Santa Barbara
    • UCSB

  • Andrew Cleland

    • Department of Physics, UC Santa Barbara
    • Physics Department, University of California, Santa Barbara

  • T. Yamamoto

    • Green Innovation Research Laboratories, NEC, Japan