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. 2010 Jan 8;104(1):010503.
doi: 10.1103/PhysRevLett.104.010503. Epub 2010 Jan 8.

Demonstration of a neutral atom controlled-NOT quantum gate

L Isenhower  1 , E Urban, X L Zhang, A T Gill, T Henage, T A Johnson, T G Walker, M Saffman
Affiliations

Demonstration of a neutral atom controlled-NOT quantum gate

L Isenhower et al. Phys Rev Lett. .

Abstract

We present the first demonstration of a CNOT gate between two individually addressed neutral atoms. Our implementation of the CNOT uses Rydberg blockade interactions between neutral atoms held in optical traps separated by >8 microm. Using two different gate protocols we measure CNOT fidelities of F=0.73 and 0.72 based on truth table probabilities. The gate was used to generate Bell states with fidelity F=0.48+/-0.06. After correcting for atom loss we obtain an a posteriori entanglement fidelity of F=0.58.

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