Qubit ZooProposes the Rydberg blockade mechanism for two-qubit gates between neutral atoms: when one atom is excited to a Rydberg state, the strong van der Waals interaction shifts the doubly-excited state out of resonance, preventing simultaneous excitation and enabling conditional phase gates.
Key Results
- Rydberg blockade: C₆/R⁶ interaction prevents double excitation
- Conditional phase gate in ~1 μs
- Works for atoms separated by ~5–10 μm
- Foundation for ALL neutral-atom entangling gate demonstrations
Links
- Journal: Physical Review Letters
- arXiv: quant-ph/0004038