Qubit Zoo

Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout

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Demonstrates spin coherence exceeding 10 ms for a single SiV⁻ center in diamond at millikelvin temperatures, using dynamical decoupling sequences. Achieves single-shot spin readout with >89% fidelity via resonance fluorescence.

Key Results

  • T₂ (CPMG): 13 ms at ~100 mK
  • Single-shot readout fidelity: 89%
  • Spin relaxation T₁ > 1 s at 100 mK
  • Platform: SiV⁻ in bulk diamond, dilution refrigerator

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