An FPGA-based quantum feedback system for real-time qubit control

ORAL

Abstract

Measurement-based quantum feedback is highly sought after due to its potential for quantum error correction and preserving quantum coherence. However, measurement-based quantum feedback has been difficult to achieve due to the limited lifetime of qubits as compared to the longer time required for readout and feedback signal processing. We present a new FPGA-based qubit control architecture that integrates the qubit readout, state recognition, and feedback response together to minimize latency. Using our initial hardware, we demonstrate real-time quantum feedback on superconducting qubits and apply this technology to a multi-qubit superconducting quantum processor.

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Presenters

  • Unpil Baek

    Physics, University of California, Berkeley, Physics, Univ of California – Berkeley, University of California, Berkeley

Authors

  • Unpil Baek

    Physics, University of California, Berkeley, Physics, Univ of California – Berkeley, University of California, Berkeley

  • Yilun Xu

    Lawrence Berkeley National Laboratory

  • Gang Huang

    Lawrence Berkeley National Laboratory

  • Lawrence Doolittle

    Lawrence Berkeley National Laboratory

  • Irfan Siddiqi

    University of California, Berkeley, Physics, University of California, Berkeley, Univ of California – Berkeley, Univ of California - Berkeley, Physics, Univ of California – Berkeley