Optimal feedback for remote entanglement

ORAL

Abstract

Recent experiments in superconducting qubits have demonstrated measurement as a resource for entanglement, even when qubits are spatially separated to a significant degree. We consider the problem of using measurement combined with feedback to deterministically entangle remote qubits. This constraint forces us to consider only local feedback, which leads us to an interesting control-theory problem. Within this constraint, we derive a series of protocols for this system which generate entanglement as quickly as possible. We find that even in the presence of expected experimental imperfections, it should be possible to achieve high-fidelity entanglement with currently accessible experimental parameters.

*This work is supported by the National Science Foundation

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Authors

  • L. Martin

    • Whaley Research Group and QNL, University of California, Berkeley
    • QNL, University of California, Berkeley

  • Felix Motzoi

    • Whaley Research Group, University of California, Berkeley
    • University of California, Berkeley

  • Hanhan Li

    • Whaley Research Group, University of California, Berkeley

  • Mohan Sarovar

    • Whaley Research Group, University of California, Berkeley

  • I. Siddiqi

    • Quantum Nanoelectronics Laboratory, Department of Physics, University of California, Berkeley CA
    • QNL, University of California, Berkeley
    • University California Berkeley
    • University of California at Berkeley

  • Birgitta Whaley

    • Whaley Research Group, University of California, Berkeley