Qubit Zoo

A silicon-based nuclear spin quantum computer

1 min read

Proposes using the nuclear spin of ³¹P donor atoms in isotopically pure ²⁸Si as qubits, with hyperfine interaction to donor electron spins mediating two-qubit gates via gate-controlled exchange coupling. A foundational vision for silicon quantum computing.

Key Results

  • Qubit: nuclear spin of ³¹P in ²⁸Si (I = 1/2)
  • Single-qubit gates via NMR with A-gate tuning of hyperfine coupling
  • Two-qubit gates via J-gate control of exchange between donor electrons
  • Predicted coherence: nuclear T₂ > seconds in enriched ²⁸Si

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