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 μm. 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.
© 2010 The American Physical Society
Isenhower L, Urban E, Zhang XL, Gill AT, Henage T, Johson TA, Walker TG, Saffman M. 2010. Demonstration of a neutral atom controlled-NOT quantum gate. Physical Review Letters 104: 010503.