Demonstration of a neutral atom controlled-NOT quantum gate

Abstract

We present the first demonstration of a CNOT gate using neutral atoms. Our implementation of the CNOT uses Rydberg blockade interactions between neutral atoms held in optical traps separated by >8 μ\rm m. We measure CNOT fidelities of F=0.73 and 0.72 using two different gate protocols, and show by measurement of parity oscillations that the gate can be used to generate two-atom states with fidelity at the threshold for entanglement. We anticipate that the long range nature of the Rydberg interaction will be attractive for future extensions of this work to multi-qubit systems.

arXiv commenttext revised, with additional references

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• Efficient multiparticle entanglement via asymmetric Rydberg blockade
• Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms
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• Neutral atom entangling gate in the ultrastrong coupling regime
• Introduction to Physical Implementations of Quantum Information Processing
• Suppressing crosstalk for Rydberg quantum gates
• Entanglement creation in cold molecular gases using strong laser pulses
• Ion-atom two-qubit quantum gate based on phonon blockade
• Fast collisional $\sqrt{\mathrm{SWAP}}$ gate for fermionic atoms in an optical superlattice
• Quantifying the impact of state mixing on the Rydberg excitation blockade
• Resonator-assisted quantum transduction between superconducting qubits and trapped atomic systems via Rydberg levels
• All-to-all connectivity of Rydberg-atom-based quantum processors with messenger qubits
• Deterministic facilitated excitation of the weakly-driven atom in heteronuclear Rydberg atom pairs beyond antiblockade