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This summary is machine-generated.

We developed a method for measuring stabilizer operators in superconducting qubits. This technique efficiently encodes qubit parity onto resonator states for fast, flexible measurements without locality constraints.

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Area of Science:

  • Quantum computing
  • Superconducting circuits
  • Quantum information science

Background:

  • Stabilizer operator measurements are crucial for quantum error correction and characterizing quantum systems.
  • Existing methods often face limitations in terms of speed, efficiency, or locality constraints.

Purpose of the Study:

  • To present a general protocol for measuring arbitrary stabilizer operators in systems of N superconducting qubits.
  • To enable efficient and flexible quantum state characterization.

Main Methods:

  • Utilizing dispersive coupling between superconducting qubits and a resonator's field.
  • Employing single qubit rotations to encode parity information.
  • Encoding the parity of M qubits onto two quasiorthogonal coherent states of the resonator.
  • Implementing fast cavity readout for efficient measurement.

Main Results:

  • Demonstrated a protocol for efficient measurement of arbitrary stabilizer operators.
  • The method allows encoding parity of a subset of qubits onto resonator states.
  • Achieved measurements without locality constraints, enhancing flexibility.

Conclusions:

  • The presented protocol offers a general and efficient approach for stabilizer operator measurements in superconducting quantum systems.
  • This technique advances the capabilities for quantum error correction and quantum information processing.