Applications of a Circuit QED Quantum Channel Constructor

ORAL

Abstract

Quantum channels can describe all transformations allowed by quantum mechanics. We provide an explicit universal protocol to construct all possible quantum channels, using a single qubit ancilla with quantum non-demolition readout and adaptive control. Our construction is efficient in both physical resources and circuit depth, and can be demonstrated using superconducting circuits and various other physical platforms. There are many applications of quantum channel construction, including system stabilization and quantum error correction, Markovian and exotic channel simulation, implementation of generalized quantum measurements and more general quantum instruments. Efficient construction of arbitrary quantum channels opens up exciting new possibilities for quantum control, quantum sensing and information processing tasks.

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Authors

  • Chao Shen

    Yale University

  • Kyungjoo Noh

    Yale University

  • Victor V. Albert

    Yale University

  • Stefan Krastanov

    Yale University

  • M.H. Devoret

    Yale University, Department of Applied Physics, Yale University, New Haven, USA, Department of Applied Physics, Yale University

  • R.J. Schoelkopf

    Yale University, Department of Applied Physics, Yale University

  • S. M. Girvin

    Yale University

  • Liang Jiang

    Department of Applied Physics and Yale Quantum Institute, Yale University, Yale University