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Single-Shot Readout of a Solid-State Electron Spin Qutrit.

Yuhang Guo1,2, Wentao Ji1,2,3, Xi Kong4

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Researchers achieved reliable single-shot readout of electron spin qutrits in diamond using a binary scheme. This breakthrough enables quantum contextuality tests and advances quantum information processing with high-dimensional quantum systems.

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Area of Science:

  • Quantum Information Science
  • Solid-State Physics
  • Quantum Technologies

Background:

  • Quantum systems offer superior potential for quantum technologies due to their multilevel structure.
  • Single-shot readout is crucial for utilizing high-dimensional quantum systems.
  • Readout of high-spin systems remains a significant challenge.

Purpose of the Study:

  • To demonstrate a reliable single-shot readout of a spin qutrit state.
  • To utilize the spin qutrit system for testing quantum contextuality.
  • To advance quantum information processing capabilities.

Main Methods:

  • Utilized a low-temperature solid-state system with a binary readout scheme.
  • Achieved single-shot readout of an electron spin qutrit associated with a single nitrogen-vacancy center in diamond.
  • Employed the spin qutrit system to verify quantum contextuality.

Main Results:

  • Demonstrated a reliable single-shot readout of spin qutrit state with an average fidelity of 87.80%.
  • Observed a violation of the noncontextual hidden variable inequality.
  • Showcased the effectiveness of the developed readout scheme compared to conventional binary readout.

Conclusions:

  • The developed single-shot readout scheme reliably accesses spin qutrit states.
  • This method facilitates fundamental tests of quantum mechanics like quantum contextuality.
  • The findings pave the way for quantum information processing based on spin qutrits.